It's possible the controller has failed. You can find replacement controllers on Ebay (search for "replacement jebao controller").
Another thing to try is replacing the power supply. It's possible the power supply has failed and is supplying enough power for the controller to error out or switch on and off, but not enough power to run the pump.
If neither of those work, the pump likely has failed.
You could just order another complete pump. Once the new one arrives, try to replace the old controller and/or power supply with the new ones. That way you can just replace the broken parts and have some spare parts in the closet for when something breaks again.