Previously working application Crashing

We have our application released in Appstore.

Usually, we do Beta testing through Testflight before releasing any new version. This time we tried to release a new version, and we observed that testflight version application was crashing on launch.

When we investigated our application's previously tested/working testflight versions, we noticed those are also crashing now.

Please advice what could be the issue?

If the app is crashing on launch then you should be able to debug it with the code, right? Have you tried? Does it crash?

App is production app and has debug mode disabled. However we tired connecting to Xcode and see the logs. There is no exception logged as such which can point out the issue.

Previously working application Crashing
 
 
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