I only see one motor for the arm (to control arm angle) and only one for the telescoping arm, but there are two arm motors declared in the source code (in addition to the telescoping arm motor). Double check how many arm angle motors are actually on the robot and update the arm class to match it.
I only see one motor for the arm (to control arm angle) and only one for the telescoping arm, but there are two arm motors declared in the source code (in addition to the telescoping arm motor). Double check how many arm angle motors are actually on the robot and update the arm class to match it.