Does the light bulb flash on the motor?
Normally, your ISB’s (Infared Safety Beams) are misaligned. Make sure the little lights are on solid on the ISB’s if not, they may need a small adjustment. Call A1 Affordable Garage Door Services and we will talk you through the repair process over the phone.
Try unplugging the garage door opener from the ceiling outlet (for 30 seconds) then plugging it back into the outlet.