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cat tracker app v9.0.13 whitescreen

Hey all!

Today I tested the Asset Tracker App V2 (NCS v1.6.0) with the AWS implementation of the Cat Tracker App.

The rollout was totally fine at the end, and also the App worked well in the beginning: I could register, I could log in, I saw my Thingy device, all the details (modemfirmware, etc), at first there was no historical data, but after a few minutes I also see the charts for all of the tracked values. But after another few minutes, out of nowhere the detail view of the cat (url xxxxxx.cloudfront.net/cat/imei) became a white screen. When reloading it after a few mili seconds, also only a white screen is displayed. 

I have rolled out everything in aws region eu-central-1

The other urls (e.g. xxxxxx.cloudfront.net/cats, url xxxxxx.cloudfront.net/cats-on-map, xxxxxx.cloudfront.net/about) and also the help works fine.
This happens with

Chrome Version 91.0.4472.114, Firefox 88.0.1 and Safari Version 14.1.1 on a MacOs Big Sur 11.4 

Any suggestions where to start to repair the app or database connection or a hint what the error could be or how I could find it would be totally awesome!

Thanks a lot in Advance & have a nice weekend!

Best regards
Rudolph

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