Frigidaire Upright Freezer issue

Hi, my upright Frigidaire, FFU20F9GW5, Serial number WB11102523, is not getting cold… Its in my outside garage and I noticed water coming from the front of it with the ‘temperature warning’ light on Saturday.
I removed the inside back wall and there is NO FROST/ICE on coils, the small fan to circulate air works.
The frozen soups/roasts stay frozen but popsicles melt and will not freeze.

The compressor/condensor (black ball looking thing) on the bottom of the unit in the back is very warm, so I assume its trying to work.

What may be the deal?
Defrost thermostat?
Defrost timer?
Bracket timer?
Temperature sensor on inside of freezer?

Please don’t tell me its the compressor!

Which parts should I order? Thanks. Keith