Crashlytics reporting constant Fatal Exception: java.lang.Exception

[vitorfgd]

Hello, everyone,

I've integrated the rest client to handle some server requests that are being made. Looking at the crashlytics reports there are three errors constantly happening on every version we release, we are unable to reproduce it or identify where it's coming from and possible causes, and the crashes do not output a useful stack tracing. The only information we have are:

Fatal Exception: java.lang.Exception: RequestException : HTTP/1.1 521 Unknown HTTP status
       at Proyecto26.<CreateRequestAndRetry>d__1:MoveNext(Proyecto26)
       at UnityEngine.SetupCoroutine:InvokeMoveNext(UnityEngine)

and

Fatal Exception: java.lang.Exception: RequestException : HTTP/1.1 500 Internal Server Error
       at Proyecto26.<CreateRequestAndRetry>d__1:MoveNext(Proyecto26)
       at UnityEngine.SetupCoroutine:InvokeMoveNext(UnityEngine)

and

Fatal Exception: java.lang.Exception: RequestException : Failed to receive data
       at Proyecto26.<CreateRequestAndRetry>d__1:MoveNext(Proyecto26)
       at UnityEngine.SetupCoroutine:InvokeMoveNext(UnityEngine)

Does anyone experienced a similar problem and could point us to a possible solution or a possible problem that we can investigate?

Unity version: 2021.3.21f
OS: Android and iOS