Hallo everyone, since yesterday I can’t build my android builds anymore because I get this error!!! Working in version Unity 2021.3.23f1. I tried it in newer Unity versions there I don’t get this error but my AR Crashes 
Hey could you file a bug report. It looks like that shader was originally made for Hololens and is potentially outdated and needs to be updated to work for other platforms. You might be better off working around this by adding your own custom shader/material that you can test and customize for Android specifically, but a bug report would definitely help us to be able to resolve the issue in a future version of Unity.