This is usually a classic clogged nozzle or hot end problem if your extrusion steps/mm has already been calibrated. To determine if the nozzle or hot end is clogged, you need to be able to manually feed the filament to the hot end. You need to loosen up spring tension on the filament extruder and see if you can manually push material through when the hot end is at operating temperatures. If you have a hard time, you need to first try to unclog the nozzle with small drill bit or fine needle. If that doesn’t improve, you may need to disassemble the nozzle and hot end and manually extrude again to remove the clog. If you are able to get the clog out and clean the nozzle, you repeat the manual extrusion until the filament comes out nice and smooth (no curling).
At this point, you can apply tension to the extruder on the filament. You need to run an extruder calibration if you haven’t done so. There are lots of instructions online. You basically heat up the hot end and extrude a fixed amount of filament and measure how much has been extruded. You change the steps/mm settings on the extruder until you get the exact length to match the amount you extruded. At this point, you should be able to print again.
