I just had the inverter replaced and now my AC isn't working

Check the operation of radiator fan(s). When the a/c turns on, the fan should come on when the a/c pressure is above 220ish.

Agree possible cooling fan issue. Could be fan, control module, relay, or just a fuse. Could also be low freon or a weak compressor. With repairs on your problem being 20 to 800 dollars I'd reccomend a diagnostic to be sure. Most shops can do this work. A/C diagnostics are usually cheaper than regular diagnostics and you could be looking at a 20 30 dollar relay.