I bought the assembled version of the Prusa core one+ (gen 2). Got through the setup and calibration until hitting a (literal) snag when attempting to calibrate the filament sensors.

The assembled printer is supposed to come with a bit of orange PLA filament already loaded, sticking out of the end near the spool holder. I can see the orange filament in the PTFE tube, but the bit that's supposed to stick out seems to have snapped off. Telling the printer to unload the filament doesn't do anything.

I'm coming from a BambuLab A1 Mini, so I'm very much in the printing side of the hobby and not the printer side of the hobby, and I get a bit lost when the first step seems to be to completely disassemble the business end of the printer.