We have identified an error with custom actions with a JSON body. If your Custom Action is affected, the error that you would see is Error 422.
This seems to have started on September 9, 2022 at 4.30 am CT (GMT-6).
We are currently investigating this and will be releasing updates on Adalo | Status Page. We request you to post this announcement in any post that you see, and redirect them to the status page as the source of truth to consolidate information. Thank you for your patience!