A refrigerator leak almost always starts at one of five places: the defrost drain, the drain pan, the water supply line, the inlet valve or the ice maker fill tube. Where the water shows up, and whether it appears only after the ice maker or defrost cycle runs, tells you which one you are dealing with.
Central Minnesota Appliance Repair sees the same pattern across the Twin Cities. A fridge with no water line is almost always a defrost drain or a door gasket problem. A fridge with a water dispenser or ice maker adds the supply line, inlet valve and fill tube to the list. Start by noting whether your model has a dispenser, because that shortens the list.