We have successfully setup a flow against a particular survey which has been running smoothly. I've gone to to replicate the same process (when a survey is submitted, add a row to a an existing table) and we're getting the following problems:
Dynamic content is not available. So I manually typed using expression:
triggerOutputs()?['body/feature/attributes/Borough']
this worked on a previous flow without issues.
When I save the flow the following error appears:
The response from API 'survey123' operation 'GetWebhookPayloadSchema' with status code '200' does not contain a valid OpenAPI schema object.
Screen image example:

It is worth adding this survey contains a repeat. The feature layer contains two layers, survey points and (repeating) assets, and a photos table.
Any ideas?
Thanks,
Christina