Unreal app for hololens 2 device

I m a student who is trying to do an project using unreal engine 4…I package the app for hololens 2 device. what happening is when I run the app in device it is crashing down and coming back to home.What should I do to resolve it?

And for the another project it is saying like Signing key not found. The app could not be digitally signed, because the signing key is not configured.Even when i tried changing the CN and generate the certificate

Hard to say, there may be many reasons. Have you tried to package blank project or demo project for MicrosoftOpenXR plugin? Also, connect to device in browser and download log file after crash.

yeah I tried and It worked…
Thank you