Chances are something got to the pump, causing it to freeze and therefore stalling the motor. Since everything is connected to a single belt underneath, removing the belt and isolating the pump so you can try the pulley in both directions would be a good start. See if the motor will then run without a belt attached to confirm if it is also a problem.
You can read the manual
to see how to open the top and front panels if you'd like to access these items. The belt requires no disassembly as it is under the machine.