Printer stops extruding in the middle of printing

6.: Check whether the printer is out of filament.
7.: Check whether the filament is stripped; see item 3 above.
8.: Check whether the extruder is clogged; see item 5 above.
9.: Online, you may find discussions of prints stopping due to a printer’s extruder motor overheating, but that only tends to occur with home-built or off-brand printers. Modern, commercially sold 3D printers have tough extruder motors. However, if turning the printer off and letting it cool for awhile, and then resuming printing works, extruder motor overheating could be the issue; contact your printer manufacturer for recommendations on solving motor overheating on your make of printer.