APP_RETURNED_BAD_REQUEST on Zapier: The app returned 'Bad Request' or '400' — Root cause: This error typically occurs when the data Zapier is sending to a connected app does not match what the receiving app expects. This could be due to incorrect field mapping, sending an invalid data type (e.g., text where a number is required), or missing a required field that the receiving app needs to process the request successfully. The 'Bad Request' response (HTTP 400) indicates the server understood the request but could not fulfill it due to client-side errors in the data provided. — If you have followed all troubleshooting steps and the 'Bad Request' error persists, it may indicate a more complex issue with the connected app's API or a nuanced data requirement. First, double-check the official do