Door To Door Moving Electric Garage Door Not Working. Chain Moving But Door Stays Still. How Can I Fix?

Electric Garage Door not working. Chain moving but door stays still. How can I fix? - door to door moving

Hello,

We bought a house with an electric garage door. The gate has been, until recently, now all that happens is that the chain moves, but the door remains where he is. Any idea how to solve this problem?

Thank you,

Rob