Exception Report: Missing or Invalid Motor on port 1

I am getting this error when I try and run autonomous programs on clawbot: Exception Report: Missing or Invalid Motor on port 1

It had been working until today. When we try to use the robot using remote control, left hand gears aren’t moving so obviously nothing is happening with the motor.

I have checked the ports and cables are secured correctly. Have downloaded firmware again as I thought that might be an issue but the error is still happening.

Has anyone come across this before? Is there anything I can do or is it a hardware/motor issue?

See response to your other post