Worse than that for me. Android app no longer connects to ANY of my cameras: Argus (original), RLC-4105MP, RLC-420-5MP, TLC-510WS.
NONE of them will even connect.
The Windows Client still works, but the Android app is now officially "broken".

I have the absolute same problem. No connection anymore. Windows client is working, but no connection with the android app, not via WiFi and not via LTE.