i had a gps into my application that worked well for a time and now he is not working anymore and this is why it says in the console :
/SourceCache/ProtocolBuffer/ProtocolBuffer-38/Runtime/PBRequester.m:660 server returned error: 503
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Did you make the application? Or it’s a third party app?
From the error message, it’s using Protocol Buffer to communicate with the server, and the server returns error code 503. We may fairly suppose the app is using Protocol Buffer over HTTP and the error code of 503 means Service Unavailable in HTTP world.