Good evening, my name is James.
The brown water sounds like its from the condensation tray \ tube.
I would pull the fridge out and check on the back if you can see a tube is going into the tray on top of the compress, see the video here, you want to watch from 2.53 onwards.
Its most likely the hose has come lose or the water is overflowing from the evaporation\condensation tray.
Please let me know how you get on.