Here are your parts
Replacement parts for General Electric TFX22PPBBWW Refrigerator | AppliancePartsPros.com

I am assuming that the defrost cycle ended and the unit in now cooling correctly.

Sounds like the drain tube is plugged so that the water from auto defrost runs into the freezer instead of down the tube and into the drip tray under the unit.

I would check that it is clear.
If plugged a turkey baster with warm water, an air compressor with low pressure or a wire can often be used to clear it.

Also check that it is not plugged with dust etc. at the drain pan end.
You might as well clean the condenser/compressor fan and the condenser coils while you are down there.

If it looks like stuff is growing in the tube I would flush it with a 10% bleach solution. This should kill the stuff and let you flush it out. You may have to do this several times, let it sit for 15 minutes or so between flushes.

Be careful that the drip tray does not overflow and empty the drip tral after you are done.

Be sure to unplug the unit while doing this.