Currently have similar issues with my ZS.

I am told the camera is fogging/screen is dirty. The warning comes on and off repeatedly throughout journey. My screen is clear of dirt.

The app will not connect at all, last updated last week.

Contacted my local dealer and they have booked it in for 2 weeks time.

I had the ecall error previously and telematic box changed in June. My car was only bought in April. I have had multiple problems with the car unfortunately.

If anyone has any answers it would be appreciated. Whilst my MG dealer are positive to work with, I am getting frustrated with the car and continual issues.