App getting closed on opening

App is getting closed on its own. It was working fine till 4 October 2021. Today , I just changed the text of my button. And when I exported and run it in mobile. It is not getting opened. It is getting closed on its own. Please help

Have you read Avoid Crashes of the Application for some of the components ?

Otherwise use logcat to find what causes the crash

Read it . I don’t know how to use logcat

If you wish post your aia here to check it

I can’t post my aia as it’s having a lot of my personal things

Then read above guide and use logcat to see what causing the error, if you see unbound location null then something is missing from properties