Trouble using Rasa

So, I’ve got Rhasspy using Rasa for Intent Recognition, but whenever I save my sentences I get this error from Rasa (tried it with a single intent):

2022-09-27 22:05:20 ERROR    rasa.server  - The request body does not contain valid YAML. Error: Failed to validate YAML. Please make sure the file is correct and all mandatory parameters are specified. Here are the errors found during validation:

      Value 'b'  ## intent:RickRoll\\n  - rick roll\\n'' is not a list. Value path: '/nlu'

It looks like maybe the API has changed? Not really sure. Thanks for any help; love this project!