I get this error too, but not because of touch screen. When i open Full Parameter List, i dont see any parameters so i try to refresh params. After a short loading, i get this error message. I’m new to Mission Planner so any suggestions would help.
I disabled the touch function on my laptop and solved the problem.
I’m sorry I couldn’t help with your issue, but it would be better if you attached your error message and provided more details. Your question is too vague.