We are having this same problem, and completed all the steps you suggested to no avail. The PWM's are set to port 1 and 2 in the code and plugged into port 1 and 2 in the sidecar. We ran also 'built' the FRC Robot Boot Up Deployment and Ran it as Startup. The jaguars are still flashing yellow...anything else we can try?

-Team 1339