CFS No Longer Working - Steady Red Light in slot 3

My CFS is no longer working. In slot 3 there is a steady Red Light. None of the slots will feed filament. When I try to add roll to the slot, the filament just stops shortly after feeding in. Normally this would trigger the motor to pull the filament in, but the only thing that happens is a white steady indicator.

So far,

  • Checked the hub. Basically, took it off and apart to see if there where anything stuck. Do not see anything internally. Reassembled as required.
  • Took the front - checked the way tubes, in the four front slots. Did not see any issues.

Not sure if this is related, but this started after updating the firmware. I did calibrate after.

Now the CFS is no longer working.