Application do not exist


our Android and iOS application have stopped working abruptly. Using a debugger, we found this error message:

2024-04-13 11:44:45.655 5445-5445 FCMRegistration com.dynamicom.nelcuoredisanta D Could not register device on Backendless server: BackendlessFault { code: ‘See details for error code’, message: ’ Server reported an error . See fault details for additional information’, detail: ‘{“code”:9000,“message”:" Application with ID B7A83EC5-45B7-80DA-FF61-B7EFC8AA9400 does not exist ",“errorData”:{}}’, extendedData: ‘{}’ }
2024-04-13 11:44:45.655 5445-5445 push com.dynamicom.nelcuoredisanta D Error
2024-04-13 11:45:01.119 5445-5457 System com.dynamicom.nelcuoredisanta W A resource failed to call close.

Of course the application exists, on the EU servers. Do you have problems in the EU inftrastructure?

Can you please advise? we have 200 people using the application right now and we are swamped by messages.

Thank you

Do you set the hosting zone URL in your code per the instructions here?