These lights are linked to safety features in your garage door. If they are blocked or mis-aligned, the lights may blink, and the garage door will not close. First, verify that the “lock” button is set to “off.” Once it is off, press the button on the remote control. The door should close. If that doesn’t work, check the alignment of the safety reversing sensors.
If you have recently installed LED lights in your garage, they may also be the cause of the issue. Some low quality LED lightbulbs interfere with the signal from the remote control and may prevent the door from working.