Encountered an exception while running action 'action_hello_world'. Bot will continue, but the actions events are lost. Make sure to fix the exception in your custom code

**Rasa versionRasa 1.1.4:

Rasa X version (if used & relevant):0.19.2

Python version:3.7.3

Operating system (windows, osx, …):UBUNTU 19.04

Issue: Traceback (most recent call last): File “/home/arbaz/anaconda3/lib/python3.7/site-packages/flask/app.py”, line 2292, in wsgi_app response = self.full_dispatch_request() File “/home/arbaz/anaconda3/lib/python3.7/site-packages/flask/app.py”, line 1815, in full_dispatch_request rv = self.handle_user_exception(e) File “/home/arbaz/anaconda3/lib/python3.7/site-packages/flask_cors/extension.py”, line 161, in wrapped_function return cors_after_request(app.make_response(f(*args, **kwargs))) File “/home/arbaz/anaconda3/lib/python3.7/site-packages/flask/app.py”, line 1718, in handle_user_exception reraise(exc_type, exc_value, tb) File “/home/arbaz/anaconda3/lib/python3.7/site-packages/flask/_compat.py”, line 35, in reraise raise value File “/home/arbaz/anaconda3/lib/python3.7/site-packages/flask/app.py”, line 1813, in full_dispatch_request rv = self.dispatch_request() File “/home/arbaz/anaconda3/lib/python3.7/site-packages/flask/app.py”, line 1799, in dispatch_request return self.view_functionsrule.endpoint File “/home/arbaz/anaconda3/lib/python3.7/site-packages/flask_cors/decorator.py”, line 128, in wrapped_function resp = make_response(f(*args, **kwargs)) File “/home/arbaz/anaconda3/lib/python3.7/site-packages/rasa_sdk/endpoint.py”, line 59, in webhook response = executor.run(action_call) File “/home/arbaz/anaconda3/lib/python3.7/site-packages/rasa_sdk/executor.py”, line 237, in run “No registered Action found for name ‘{}’.”.format(action_name) Exception: No registered Action found for name ‘action_hello_world’.

Error (including full traceback):

Command or request that led to error:

Content of configuration file (config.yml) (if relevant):

Content of domain file (domain.yml) (if relevant):

action.py file

from typing import Any, Text, Dict, List

from rasa_sdk import Action, Tracker from rasa_sdk.executor import CollectingDispatcher from rasa_core_sdk.events import SlotSet

class ActionHelloWorld(Action):

def name(self):
    return "action_hello_world"
def run(self, dispatcher, tracker, domain):
    dispatcher.utter_message("Hello World!")
    return []

Which command or quest led to this error? Could you please also reformat your question properly cause currently I’m not sure if the formatting of the Action is wrong in the code or in your question.