Unable to read crash log from fireStore in Xcode

I submit my iOS app in Apple Store Connect.

And it is rejected with crash log file.

When I run this app with my real phone, it works fine even the part that they said it crashes, it works well.

So I open crash log and it seems fireStore causes error.

2 files they sent me was below.

And regarding reading crash log, there's no much reference on internet moreover it works fine on my phone I can't check debug or do something more..

Can you help me how can I proceed with this error?

If any advice would be helpful..

+ Add full crash log

Unable to read crash log from fireStore in Xcode
 
 
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