For security reasons, taking screenshots from the ProCall mobile app for Android is generally disabled.
To create a screenshot from the ProCall Android app, this must be explicitly activated in the app.
Grant permission: Enable screenshots
In the app under Settings, activate the switch at "Enable screenshots".
Grant permission to take screenshots in the ProCall Mobile app: Settings – Enable screenshots
Only now screenshots with content of the ProCall mobile app are possible.
For security reasons, the setting is reset after 30 minutes and may need to be reactivated.