Keep Getting error called android.permission.Read_phone_state.

You can't do anything yourself. Only the author of this application.

This is a requirement of Android 11. The permission policy for READ_PHONE_STATE has been changed.

https://developer.android.com/about/versions/11/privacy/permissions?hl=en
....
"If your app targets Android 11 or higher and needs to access the phone number APIs shown in the following list, you must request the READ_PHONE_NUMBERS permission, instead of the READ_PHONE_STATE permission."
...

All you can do is report the issue to the app developer so they can comply with Google's guidelines.