Argon Breathing Cyan but not reachable

[ScruffR]

This was solved here

Argon flashing cyan but not reachable

It would work briefly, then have the same problem. I think I figured out the problem. The student had a sensor plugged in and the pins were wrong so it was crashing the sketch. It would get cleared out when flashing Tinker but then would crash again when flashing the sketch they were trying to use.