ERROR rasa.core.channels.rest - An exception occured while handling user message 'None'

Rasa Open Source
1

I have some error when hit the api, the status returned 200 but with empty array

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the error

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all code is still default from rasa init. How to fix this problem? because if i run rasa interactive or shell its doing well. here my rasa version

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2

Change text to message in the payload.