Hello, I had exactly the same problem, the solution in my case was to make sure that the wipe was not too dry. I suspect that when the wipe is dry, the resistance when rotating (when it reaches the top edge of the window) is too great, causing the appliance to switch off.

1:1 the same problem. Have you found a solution in the meantime? I'm getting desperate.

I have the exact same problem with a brand new Winbot Pro. After the first 90 degree rotation at the top of the window, the error message appears.

No, error message not known, unfortunately cannot help!

no, my window cleaner does its job perfectly without any error messages.