AttributeError: module 'pyparsing' has no attribute 'downcaseTokens' rasa

I am facing a problem working with rasa, i can’t run or train or do anything because below error.

Traceback (most recent call last): File “c:\users\dell\anaconda3\envs\rasanew\lib\runpy.py”, line 193, in run_module_as_main “main”, mod_spec) File “c:\users\dell\anaconda3\envs\rasanew\lib\runpy.py”, line 85, in run_code exec(code, run_globals) File "C:\Users\Dell\anaconda3\envs\rasanew\Scripts\rasa.exe_main.py", line 7, in File "c:\users\dell\anaconda3\envs\rasanew\lib\site-packages\rasa_main.py", line 118, in main cmdline_arguments.func(cmdline_arguments) File “c:\users\dell\anaconda3\envs\rasanew\lib\site-packages\rasa\cli\scaffold.py”, line 235, in run init_project(args, path) File “c:\users\dell\anaconda3\envs\rasanew\lib\site-packages\rasa\cli\scaffold.py”, line 130, in init_project print_train_or_instructions(args, path) File “c:\users\dell\anaconda3\envs\rasanew\lib\site-packages\rasa\cli\scaffold.py”, line 69, in print_train_or_instructions training_result = rasa.train(domain, config, training_files, output) File “c:\users\dell\anaconda3\envs\rasanew\lib\site-packages\rasa\api.py”, line 106, in train from rasa.model_training import train_async File “c:\users\dell\anaconda3\envs\rasanew\lib\site-packages\rasa\model_training.py”, line 39, in from rasa.core.agent import Agent File “c:\users\dell\anaconda3\envs\rasanew\lib\site-packages\rasa\core\agent.py”, line 16, in from rasa.core.channels.channel import OutputChannel, UserMessage File “c:\users\dell\anaconda3\envs\rasanew\lib\site-packages\rasa\core\channels_init.py", line 26, in from rasa.core.channels.hangouts import HangoutsInput # noqa: F401 File “c:\users\dell\anaconda3\envs\rasanew\lib\site-packages\rasa\core\channels\hangouts.py”, line 9, in from oauth2client import client File “c:\users\dell\anaconda3\envs\rasanew\lib\site-packages\oauth2client\client.py”, line 39, in from oauth2client import transport File “c:\users\dell\anaconda3\envs\rasanew\lib\site-packages\oauth2client\transport.py”, line 17, in import httplib2 File "c:\users\dell\anaconda3\envs\rasanew\lib\site-packages\httplib2init_.py”, line 52, in from . import auth File “c:\users\dell\anaconda3\envs\rasanew\lib\site-packages\httplib2\auth.py”, line 20, in auth_param_name = token.copy().setName(“auth-param-name”).addParseAction(pp.downcaseTokens) AttributeError: module ‘pyparsing’ has no attribute ‘downcaseTokens’

So what command you used? What is your environmentt? What Rasa and environment versions you have?