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You have a plugged up condensate drain line. To resolve the problem remove the back cover inside of the the freezer compartment. At the bottom of the evaporator coils is a drain hole. Flush it out with a turkey baster and some boiling hot water. Once it is clear the water that is melted off of the evaporator coils during the defrost cycle will once again drain into the evaporation tray above the compressor. The heat from the compressor then evaporates the water back into the ambient air of the kitchen.
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If it was leaking from the ice maker it would leak into the ice bin and then freeze into a solid mass at the bottom of the storage bin. A dispenser leak would also be noticable in places other than just the bottom of the freezer.
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Sounds like you just have a loose connection.
At the bottom hinge of the freezer door is a connector. Make sure that it is connected properly.