You may have broken a shear pin on the auger that is not turning!!
Check your manual on replacing them if that is the problem.
Fred
Husqvarna STE927(11.5HP) snowblower, MTD Pro Series 18/42 Lawnmower, MTD 6.5 HP Self Prop Lawn Mower, Weedeater 1500 Blower, Web Gensis 2000