Control panel and interior lights are dead

So first, just unplug the refrigerator or flip the breaker off to the refrigerator for 5 minutes to see if the electronics will reset. If that doesn’t work and the unit is still cooling, you may have jut accidentally put it into Sabbath mode which isn’t something you can just exit. After 72 hours the refrigerator will exit on its own and the lights will turn back on and allow you to change settings and use the dispenser again.

Other than that, if the refrigerator isn’t running and everything is blank with no lights even after resetting power, your dispenser control board just shorted out which controls the entire unit so the dispenser board would need to be replaced.