Water collects in the bottom of the freezer section and eventually runs out on the floor. The water to the ice maker is turned off. Side by Side model # MSD2756GE.

Remove panel in freezer and unclogg a hole where water collects

The one-sentence solution worked for me too, but let me add more detail.
Remove at least the bottom two baskets from the freezer, you may want to just remove them all and insulate the contents.
Unplug the refr/freezer.
The back of the freezer ramps up to that back panel. Go to the top of that panel and unscrew the two retaining screws - and don't lose them silly!You need to flex this plastic panel a bit in order to fully remove it. I think I pulled it down through the bottom.
You will see the freezer coils and some, much, or all of them may be frozen over with ice. Take out the blow dryer and melt it all off. It will probably drip down into the bottom of the freezer and onto the floor. Won't be the last water on the floor before you're done.
PLEASE ASSUME EVERY THIN PIECE OF METAL IS SHARP. I didn't get bad cuts but some find it a little disconcerting.
Below the coils is a metal box for collecting condensation, and if you have this problem, it is almost DEFINITELY frozen over, above and below. I knocked this ice off with a screwdriver but you might just as well melt it with the blow dryer again.
The condensation collector box has a drain in the center and this is what's clogged. Use a small screwdriver to clear the drain. I had to chip a little bit and ended up with the driver about 2-3" into the drain. At that point I declared victory and got out.
Now I removed this condensation box but I don't know if I needed to and I'd avoid doing this in the future. However, I'll say how in case someone needs it. Remove the single screw in the upper back holding it in. This is another part that can be flexed to remove. To remove the box you will need to gently pull out the coils at the bottom maybe 1-1/2". As I flexed the box I pitched it bottom up and pulled up up and out past the coils.