Hi, just got my A1 and after connecting everything I had the same issue. After some troubleshooting I found, that the first time AMS tries to feed the filament, it will hit extruder gear, cannot push trough it which results with error message. So the only thing you have to do is to push “extruder gear disengage lever” until filaments feeds into the hotend. After that, there will be a piece of filament in the hotend, because cutter cuts it before hotend. Next filament will push that piece out.