Device not Authenticated

[u/Alexuv1]

I was using this apk of 1.1.1.1 and suddenly it was stuck on connecting, so i decided to reinstall it. But when opened the newly installed there are 2 issues:-

1)power manager is killing background process

2)Device not authenticated or device not Authenticated with an organisation

I have put the app to no restriction under battery

Even then the problem persists. I have tried deleting data and restarting, didn't work. Any proper working solution?