Got error on rasa init on Windows

Getting Started with Rasa
1

Hi,

i just started on Rasa and followed the installation based on the youtube via anaconda and got the error below after issuing the rasa init command, any thoughts how to fix

? Please enter a path where the project will be created [default: current directory] . Created project directory at ‘C:\Users\Cyrus\Documents\Rasa_Projects\newProj’. Finished creating project structure. ? Do you want to train an initial model? :muscle:t4: Yes Training an initial model… Training Core model… Traceback (most recent call last):

  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\rasa\core\registry.py”, line 21, in policy_from_module_path*
  • module_path, lookup_path=“rasa.core.policies.registry”*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\rasa\utils\common.py”, line 208, in class_from_module_path*
  • m = importlib.import_module(lookup_path)*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\importlib_init_.py”, line 127, in import_module*
  • return _bootstrap._gcd_import(name[level:], package, level)*
  • File “”, line 1006, in _gcd_import*
  • File “”, line 983, in _find_and_load*
  • File “”, line 967, in _find_and_load_unlocked*
  • File “”, line 677, in _load_unlocked*
  • File “”, line 728, in exec_module*
  • File “”, line 219, in _call_with_frames_removed*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\rasa\core\policies\registry.py”, line 5, in *
  • from rasa.core.policies.ted_policy import TEDPolicy*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\rasa\core\policies\ted_policy.py”, line 26, in *
  • from rasa.utils.tensorflow.models import RasaModel*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\rasa\utils\tensorflow\models.py”, line 12, in *
  • from rasa.utils.tensorflow.model_data import RasaModelData, FeatureSignature*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\rasa\utils\tensorflow\model_data.py”, line 7, in *
  • from sklearn.model_selection import train_test_split*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\sklearn_init_.py”, line 82, in *
  • from .base import clone*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\sklearn\base.py”, line 20, in *
  • from .utils import _IS_32BIT*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\sklearn\utils_init_.py”, line 27, in *
  • from .fixes import np_version*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\sklearn\utils\fixes.py”, line 18, in *
  • import scipy.stats*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\scipy\stats_init_.py”, line 384, in *
  • from .stats import **
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\scipy\stats\stats.py”, line 185, in *
  • from . import distributions*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\scipy\stats\distributions.py”, line 10, in *
  • from ._distn_infrastructure import (entropy, rv_discrete, rv_continuous,*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\scipy\stats_distn_infrastructure.py”, line 25, in *
  • from scipy import optimize*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\scipy\optimize_init_.py”, line 390, in *
  • from ._minimize import **
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\scipy\optimize_minimize.py”, line 30, in *
  • from ._trustregion_constr import _minimize_trustregion_constr*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\scipy\optimize_trustregion_constr_init_.py”, line 4, in *
  • from .minimize_trustregion_constr import _minimize_trustregion_constr*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\scipy\optimize_trustregion_constr\minimize_trustregion_constr.py”, line 4, in *
  • from scipy.sparse.linalg import LinearOperator*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\scipy\sparse\linalg_init_.py”, line 116, in *
  • from .eigen import **
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\scipy\sparse\linalg\eigen_init_.py”, line 11, in *
  • from .arpack import **
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\scipy\sparse\linalg\eigen\arpack_init_.py”, line 22, in *
  • from .arpack import **
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\scipy\sparse\linalg\eigen\arpack\arpack.py”, line 45, in *
  • from . import _arpack* ImportError: DLL load failed: The specified procedure could not be found.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):

  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\rasa\core\policies\ensemble.py”, line 308, in from_dict*
  • constr_func = registry.policy_from_module_path(policy_name)*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\rasa\core\registry.py”, line 24, in policy_from_module_path*
  • raise ImportError(f"Cannot retrieve policy from path ‘{module_path}’")* ImportError: Cannot retrieve policy from path ‘MemoizationPolicy’

During handling of the above exception, another exception occurred:

Traceback (most recent call last):

  • File “c:\users\cyrus.conda\envs\installingrasa\lib\runpy.py”, line 193, in _run_module_as_main*
  • “main”, mod_spec)*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\runpy.py”, line 85, in _run_code*
  • exec(code, run_globals)*
  • File “C:\Users\Cyrus.conda\envs\installingRasa\Scripts\rasa.exe_main_.py”, line 7, in *
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\rasa_main_.py”, line 91, in main*
  • cmdline_arguments.func(cmdline_arguments)*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\rasa\cli\scaffold.py”, line 206, in run*
  • init_project(args, path)*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\rasa\cli\scaffold.py”, line 118, in init_project*
  • print_train_or_instructions(args, path)*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\rasa\cli\scaffold.py”, line 58, in print_train_or_instructions*
  • args.model = rasa.train(domain, config, training_files, output)*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\rasa\train.py”, line 50, in train*
  • additional_arguments=additional_arguments,*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\asyncio\base_events.py”, line 583, in run_until_complete*
  • return future.result()*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\rasa\train.py”, line 101, in train_async*
  • additional_arguments,*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\rasa\train.py”, line 188, in _train_async_internal*
  • additional_arguments=additional_arguments,*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\rasa\train.py”, line 223, in _do_training*
  • additional_arguments=additional_arguments,*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\rasa\train.py”, line 361, in _train_core_with_validated_data*
  • additional_arguments=additional_arguments,*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\rasa\core\train.py”, line 43, in train*
  • policies = config.load(policy_config)*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\rasa\core\config.py”, line 28, in load*
  • return PolicyEnsemble.from_dict(config_data)*
  • File “c:\users\cyrus.conda\envs\installingrasa\lib\site-packages\rasa\core\policies\ensemble.py”, line 319, in from_dict*
  • “”.format(policy_name)* rasa.core.policies.ensemble.InvalidPolicyConfig: Module for policy ‘MemoizationPolicy’ could not be loaded. Please make sure the name is a valid policy.

thanks for any help.

2

Hi @hellfox76. I am assuming you followed the steps in this video. Did you make sure to download the correct version of Microsoft Visual C++ for your computer?

3

Hi Ty Dunn,

yes i followed the instruction from the video, and for the C++, i tried to uninstall , then install again. it has provided me with a different error message now:

*(installrasa2) C:\Users\Cyrus\RASA_PROJ>rasa init Welcome to Rasa! :robot:

To get started quickly, an initial project will be created. If you need some help, check out the documentation at Introduction to Rasa Open Source. Now let’s start! :point_down:t4:

? Please enter a path where the project will be created [default: current directory] y ? Path ‘y’ does not exist :face_with_monocle:. Create path? Yes Created project directory at ‘C:\Users\Cyrus\RASA_PROJ\y’. Finished creating project structure. ? Do you want to train an initial model? :muscle:t4: Yes Training an initial model… Training Core model… Traceback (most recent call last): File “c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\rasa\core\registry.py”, line 21, in policy_from_module_path module_path, lookup_path=“rasa.core.policies.registry” File “c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\rasa\utils\common.py”, line 208, in class_from_module_path m = importlib.import_module(lookup_path) File “c:\users\cyrus.conda\envs\installrasa2\lib\importlib_init_.py”, line 127, in import_module return _bootstrap._gcd_import(name[level:], package, level) File “”, line 1006, in _gcd_import File “”, line 983, in _find_and_load File “”, line 967, in _find_and_load_unlocked File “”, line 677, in load_unlocked File “”, line 728, in exec_module File “”, line 219, in call_with_frames_removed File “c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\rasa\core\policies\registry.py”, line 5, in from rasa.core.policies.ted_policy import TEDPolicy File “c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\rasa\core\policies\ted_policy.py”, line 26, in from rasa.utils.tensorflow.models import RasaModel File “c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\rasa\utils\tensorflow\models.py”, line 12, in from rasa.utils.tensorflow.model_data import RasaModelData, FeatureSignature File “c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\rasa\utils\tensorflow\model_data.py”, line 7, in from sklearn.model_selection import train_test_split File "c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\sklearn_init.py", line 82, in from .base import clone File “c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\sklearn\base.py”, line 20, in from .utils import IS_32BIT File "c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\sklearn\utils_init.py", line 27, in from .fixes import np_version File “c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\sklearn\utils\fixes.py”, line 18, in import scipy.stats File "c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\scipy\stats_init.py", line 384, in from .stats import * File “c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\scipy\stats\stats.py”, line 185, in from . import distributions File “c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\scipy\stats\distributions.py”, line 10, in from .distn_infrastructure import (entropy, rv_discrete, rv_continuous, File “c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\scipy\stats_distn_infrastructure.py”, line 25, in from scipy import optimize File "c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\scipy\optimize_init.py", line 390, in from .minimize import * File “c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\scipy\optimize_minimize.py”, line 30, in from .trustregion_constr import minimize_trustregion_constr File "c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\scipy\optimize_trustregion_constr_init.py", line 4, in from .minimize_trustregion_constr import minimize_trustregion_constr File “c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\scipy\optimize_trustregion_constr\minimize_trustregion_constr.py”, line 4, in from scipy.sparse.linalg import LinearOperator File "c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\scipy\sparse\linalg_init.py", line 116, in from .eigen import * File "c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\scipy\sparse\linalg\eigen_init.py", line 11, in from .arpack import * File "c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\scipy\sparse\linalg\eigen\arpack_init.py", line 22, in from .arpack import * File “c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\scipy\sparse\linalg\eigen\arpack\arpack.py”, line 45, in from . import _arpack ImportError: DLL load failed: The specified procedure could not be found.

During handling of the above exception, another exception occurred:

Traceback (most recent call last): File “c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\rasa\core\policies\ensemble.py”, line 308, in from_dict constr_func = registry.policy_from_module_path(policy_name) File “c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\rasa\core\registry.py”, line 24, in policy_from_module_path raise ImportError(f"Cannot retrieve policy from path ‘{module_path}’") ImportError: Cannot retrieve policy from path ‘MemoizationPolicy’

During handling of the above exception, another exception occurred:

Traceback (most recent call last): File “c:\users\cyrus.conda\envs\installrasa2\lib\runpy.py”, line 193, in run_module_as_main “main”, mod_spec) File “c:\users\cyrus.conda\envs\installrasa2\lib\runpy.py”, line 85, in run_code exec(code, run_globals) File "C:\Users\Cyrus.conda\envs\installrasa2\Scripts\rasa.exe_main.py", line 7, in File "c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\rasa_main.py", line 91, in main cmdline_arguments.func(cmdline_arguments) File “c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\rasa\cli\scaffold.py”, line 206, in run init_project(args, path) File “c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\rasa\cli\scaffold.py”, line 118, in init_project print_train_or_instructions(args, path) File “c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\rasa\cli\scaffold.py”, line 58, in print_train_or_instructions args.model = rasa.train(domain, config, training_files, output) File “c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\rasa\train.py”, line 50, in train additional_arguments=additional_arguments, File “c:\users\cyrus.conda\envs\installrasa2\lib\asyncio\base_events.py”, line 583, in run_until_complete return future.result() File “c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\rasa\train.py”, line 101, in train_async additional_arguments, File “c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\rasa\train.py”, line 188, in _train_async_internal additional_arguments=additional_arguments, File “c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\rasa\train.py”, line 223, in _do_training additional_arguments=additional_arguments, File “c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\rasa\train.py”, line 361, in _train_core_with_validated_data additional_arguments=additional_arguments, File “c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\rasa\core\train.py”, line 43, in train policies = config.load(policy_config) File “c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\rasa\core\config.py”, line 28, in load return PolicyEnsemble.from_dict(config_data) File “c:\users\cyrus.conda\envs\installrasa2\lib\site-packages\rasa\core\policies\ensemble.py”, line 319, in from_dict “”.format(policy_name) rasa.core.policies.ensemble.InvalidPolicyConfig: Module for policy ‘MemoizationPolicy’ could not be loaded. Please make sure the name is a valid policy.*

4

Hmm, sounds like it could be an issue with the versions & dependencies… What if you start a new conda environment with Python 3.6? Do you get the same error?

5

yeah i did try to specify python 3.6.8, got the error below :frowning:

(installRasa) C:\Users\Cyrus\Documents\Rasa_Projects\new>rasa init Welcome to Rasa! :robot:

To get started quickly, an initial project will be created. If you need some help, check out the documentation at Introduction to Rasa Open Source. Now let’s start! :point_down:t4:

? Please enter a path where the project will be created [default: current directory] . Created project directory at ‘C:\Users\Cyrus\Documents\Rasa_Projects\new’. Finished creating project structure. ? Do you want to train an initial model? :muscle:t4: Yes Training an initial model… Training Core model… Traceback (most recent call last): File “c:\users\cyrus.conda\envs\installrasa\lib\site-packages\rasa\core\registry.py”, line 21, in policy_from_module_path module_path, lookup_path=“rasa.core.policies.registry” File “c:\users\cyrus.conda\envs\installrasa\lib\site-packages\rasa\utils\common.py”, line 208, in class_from_module_path m = importlib.import_module(lookup_path) File “c:\users\cyrus.conda\envs\installrasa\lib\importlib_init_.py”, line 126, in import_module return _bootstrap._gcd_import(name[level:], package, level) File “”, line 994, in _gcd_import File “”, line 971, in _find_and_load File “”, line 955, in _find_and_load_unlocked File “”, line 665, in load_unlocked File “”, line 678, in exec_module File “”, line 219, in call_with_frames_removed File “c:\users\cyrus.conda\envs\installrasa\lib\site-packages\rasa\core\policies\registry.py”, line 5, in from rasa.core.policies.ted_policy import TEDPolicy File “c:\users\cyrus.conda\envs\installrasa\lib\site-packages\rasa\core\policies\ted_policy.py”, line 26, in from rasa.utils.tensorflow.models import RasaModel File “c:\users\cyrus.conda\envs\installrasa\lib\site-packages\rasa\utils\tensorflow\models.py”, line 12, in from rasa.utils.tensorflow.model_data import RasaModelData, FeatureSignature File “c:\users\cyrus.conda\envs\installrasa\lib\site-packages\rasa\utils\tensorflow\model_data.py”, line 7, in from sklearn.model_selection import train_test_split File "c:\users\cyrus.conda\envs\installrasa\lib\site-packages\sklearn_init.py", line 82, in from .base import clone File “c:\users\cyrus.conda\envs\installrasa\lib\site-packages\sklearn\base.py”, line 20, in from .utils import IS_32BIT File "c:\users\cyrus.conda\envs\installrasa\lib\site-packages\sklearn\utils_init.py", line 27, in from .fixes import np_version File “c:\users\cyrus.conda\envs\installrasa\lib\site-packages\sklearn\utils\fixes.py”, line 18, in import scipy.stats File "c:\users\cyrus.conda\envs\installrasa\lib\site-packages\scipy\stats_init.py", line 384, in from .stats import * File “c:\users\cyrus.conda\envs\installrasa\lib\site-packages\scipy\stats\stats.py”, line 185, in from . import distributions File “c:\users\cyrus.conda\envs\installrasa\lib\site-packages\scipy\stats\distributions.py”, line 10, in from .distn_infrastructure import (entropy, rv_discrete, rv_continuous, File “c:\users\cyrus.conda\envs\installrasa\lib\site-packages\scipy\stats_distn_infrastructure.py”, line 25, in from scipy import optimize File "c:\users\cyrus.conda\envs\installrasa\lib\site-packages\scipy\optimize_init.py", line 390, in from .minimize import * File “c:\users\cyrus.conda\envs\installrasa\lib\site-packages\scipy\optimize_minimize.py”, line 30, in from .trustregion_constr import minimize_trustregion_constr File "c:\users\cyrus.conda\envs\installrasa\lib\site-packages\scipy\optimize_trustregion_constr_init.py", line 4, in from .minimize_trustregion_constr import minimize_trustregion_constr File “c:\users\cyrus.conda\envs\installrasa\lib\site-packages\scipy\optimize_trustregion_constr\minimize_trustregion_constr.py”, line 4, in from scipy.sparse.linalg import LinearOperator File "c:\users\cyrus.conda\envs\installrasa\lib\site-packages\scipy\sparse\linalg_init.py", line 116, in from .eigen import * File "c:\users\cyrus.conda\envs\installrasa\lib\site-packages\scipy\sparse\linalg\eigen_init.py", line 11, in from .arpack import * File "c:\users\cyrus.conda\envs\installrasa\lib\site-packages\scipy\sparse\linalg\eigen\arpack_init.py", line 22, in from .arpack import * File “c:\users\cyrus.conda\envs\installrasa\lib\site-packages\scipy\sparse\linalg\eigen\arpack\arpack.py”, line 45, in from . import _arpack ImportError: DLL load failed: The specified procedure could not be found.

During handling of the above exception, another exception occurred:

Traceback (most recent call last): File “c:\users\cyrus.conda\envs\installrasa\lib\site-packages\rasa\core\policies\ensemble.py”, line 308, in from_dict constr_func = registry.policy_from_module_path(policy_name) File “c:\users\cyrus.conda\envs\installrasa\lib\site-packages\rasa\core\registry.py”, line 24, in policy_from_module_path raise ImportError(f"Cannot retrieve policy from path ‘{module_path}’") ImportError: Cannot retrieve policy from path ‘MemoizationPolicy’

During handling of the above exception, another exception occurred:

Traceback (most recent call last): File “c:\users\cyrus.conda\envs\installrasa\lib\runpy.py”, line 193, in run_module_as_main “main”, mod_spec) File “c:\users\cyrus.conda\envs\installrasa\lib\runpy.py”, line 85, in run_code exec(code, run_globals) File "C:\Users\Cyrus.conda\envs\installRasa\Scripts\rasa.exe_main.py", line 7, in File "c:\users\cyrus.conda\envs\installrasa\lib\site-packages\rasa_main.py", line 91, in main cmdline_arguments.func(cmdline_arguments) File “c:\users\cyrus.conda\envs\installrasa\lib\site-packages\rasa\cli\scaffold.py”, line 206, in run init_project(args, path) File “c:\users\cyrus.conda\envs\installrasa\lib\site-packages\rasa\cli\scaffold.py”, line 118, in init_project print_train_or_instructions(args, path) File “c:\users\cyrus.conda\envs\installrasa\lib\site-packages\rasa\cli\scaffold.py”, line 58, in print_train_or_instructions args.model = rasa.train(domain, config, training_files, output) File “c:\users\cyrus.conda\envs\installrasa\lib\site-packages\rasa\train.py”, line 50, in train additional_arguments=additional_arguments, File “c:\users\cyrus.conda\envs\installrasa\lib\asyncio\base_events.py”, line 484, in run_until_complete return future.result() File “c:\users\cyrus.conda\envs\installrasa\lib\site-packages\rasa\train.py”, line 101, in train_async additional_arguments, File “c:\users\cyrus.conda\envs\installrasa\lib\site-packages\rasa\train.py”, line 188, in _train_async_internal additional_arguments=additional_arguments, File “c:\users\cyrus.conda\envs\installrasa\lib\site-packages\rasa\train.py”, line 223, in _do_training additional_arguments=additional_arguments, File “c:\users\cyrus.conda\envs\installrasa\lib\site-packages\rasa\train.py”, line 361, in _train_core_with_validated_data additional_arguments=additional_arguments, File “c:\users\cyrus.conda\envs\installrasa\lib\site-packages\rasa\core\train.py”, line 43, in train policies = config.load(policy_config) File “c:\users\cyrus.conda\envs\installrasa\lib\site-packages\rasa\core\config.py”, line 28, in load return PolicyEnsemble.from_dict(config_data) File “c:\users\cyrus.conda\envs\installrasa\lib\site-packages\rasa\core\policies\ensemble.py”, line 319, in from_dict “”.format(policy_name) rasa.core.policies.ensemble.InvalidPolicyConfig: Module for policy ‘MemoizationPolicy’ could not be loaded. Please make sure the name is a valid policy.