GE leaking water from underneath

Refrigerator & Freezer Repair
1

The light came on and stayed on in the door dispenser for ice and water. Shortly thereafter there was a lot of water on the floor. The water is coming from a sheetmetal box under the refer, where the water supply line attaches. We shut off the water, but have not taken anything apart yet. Any help with the highest probability of part failure? Thank you.