My filament didn’t feed and it snapped mid-print.
Parts of the filament was broken and stuck in the tube.
I dismantled the nozzle part and managed to remove the tube.
I managed to remove the stuck filament in the tube and put it back.
Now it is feeding well.
The problem is now it refuses to save after the z-axis calibration.
I can see the “save” button but I simply cannot click save.