@Solla-topee The phone is a Cubot R9 / android 7. Currently Tapo 2.17.206 which was upgraded when the problem started then uninstalled and installed afresh. Don't know which version was installed six...

Tapo has worked really well for six months. Suddenly the shared phone shows a black screen. It shows the icons for the recordings but you only hear the sound. You can take snapshots and video clips...