Creality Ender 3 S1 Plus Sprite Extruder Not Feeding and the nozzle is not clogged. I have 2 of these printers that developed similar issues within a week of each other. The first one stopped feeding entirely. A week later my second printer would start printing and at some point during the print, it would stop feeding. Spent two days sitting in que on Creality’s worthless customer service website. Both printers are still under warranty. After troubleshooting, I came to the conclusion that the ribbon cable to the Extruder from the motherboard was the issue. I ordered the cable kit on Amazon for $19.99, replaced the cable and it fixed the issue on both printers.

Official Creality 3D Printer Ender-3 S1 Cable Combination Package Screen Cable,Flat Cable and Motor Limit Cable 3D Printer Accessories:

https://a.co/d/4wuvk6g