In order to solve the issue, it is necessary to review the ODAG script, to see if all selected values need to be sent. For further investigation we recommend checking the actual payload and all the values that are sent by looking at the request body in the chrome debugger tools for the request which you got the error:
Cause
The error is usually caused because the client is not able to send all selections in the request to generate the app. That means the ODAG API request cannot be executed correctly because there are too many selected values and the database request with the new where clause actually cannot be executed, the request size is just too large, ODAG is simply rejecting the request before it processes it.