ColorMFA

Hello Everyone,
I installed the screen version 7.8.1 everything was working correctly, but since I modified the settings I can no longer display the speed or the rpm in large if the screen freezes with a white rectangle and nothing changes. I have to unplug it to restart it and not display the value in large.
I am attaching a photo
thank you

This is not ColorMFA.
Contact the guys who sold you this device.