The printer is a VC4-500 IDEX hybrid. The error occurred for the first time during a 24+ hour print. When I tried to restart the print the next day, the error occurred almost instantly again, but this time it was triggered with a material change by the Orbitor smart sensor. I tried this a few more times, even unplugging the smart sensor, but the printer started homing and heating and encountered the same error. It doesn't seem to make a difference whether the sensor is plugged in or not.
Currently, I can't even perform a homing sequence without this error occurring.