@alessandrarequena I’ve run into a similar issue here: Errors using `rasa test`
I’ve been able to prevent the code from throwing an error by creating a stub dict with value:
{‘start’: 0, ‘end’: 0, ‘entity’: ‘’, ‘value’: ‘’}
and then inserting that in place of “None”.
This allows the e2e tests to complete, but I’m not familiar enough with the metrics to know if this corrupts the results.
Let me know what you think. Thanks.