Our Cathe OnDemand App crashes when a user tries to log in.

Our Cathe OnDemand App started crashing this afternoon when users tried to log in. We use Back4App as part of the login process. Can you tell me if the problem is with Back4App or did a version change to Roku happened today that caused this issue? Any help would be greatly appreciated, as it will help me to find the correct developer to fix the issue.