Custom action rasa Exception

hi team, I’m having problem making custom action works, i start the rasa action server, it all comes up fine, and i was able invoke the test url using localhost:5055/actions, it lists all registeres actions, and health check url also works. but we i try to invoke custom, i get error Exception occured while handling uri: unknown NoneType: None

in the endpoint i have rest as localhost:5055/webhook.

Not sure what’s wrong. please help

Can you provide the actual error message from the log.