HTTP status 422 · Retry: Yes, after fixing the request · Failed requests never cost credits.
422 response
Why
App Store Connect, Play Console or Apple Ads did not accept the credentials of a connection, or a required field is missing.error.param names the field (for example credentials.private_key) and error.hint says where to find it.
Fix
Fix the field named inerror.param and create the connection again. The Connections guide lists the fields per provider.