I suspect this happens because of the line
from rasa_sdk.actions import Action,
which should be
from rasa_sdk import Action.
If this doesn’t help, or if you have questions about errors in the future please include more of the traceback. In this case for example your probably included the lines
from rasa_sdk.actions import Action
ModuleNotFoundError: No module named 'rasa_sdk.actions'
which would have made this easier to debug 