Help with warning lights: Check Engine, Yellow indicator, Red triangle and car with exclamation poin

I have a 2007 Toyota Prius. It first started acting strangely a week ago with the AC randomly blowing warm air. Never had any problem with it before. One time I'd start the car and the AC would blow cold. Next time it would be hot. It kept alternating whenever I turned the car off and then on again. Got the AC checked. Everything was fine. They said they cleaned the system out a bit but didn't even add freon as the levels were normal. No problems with the AC after that. Now a week later, driving home, the warning buzzer went off with the display screen reading "Problem". Then these 4 warning lights came on and stayed on. No unusual noise. Car seemed to be driving ok. Once again the AC started blowing hot. Seems obvious the AC was just a symptom of a bigger problem but I don't know what. I have only had the car 3 years. Haven't had any trouble with it except when the hybrid battery died in 2015. It was under warranty still and got replaced.
Is it safe to drive it somewhere to get checked? Any suggestions on what could be wrong?
Thanks!

 

They said it was the inverter pump. Error code POA93. Going to have it replaced. Also, they claimed the drive belts are very worn. Should I be worried about that or are they trying to make some extra money? They said my air filters need replaced too and I just replaced them 1 year ago.

 

Yeah...they want to charge $147 for the belt. Guess that is for the part + labor. I'm not all that mechanically inclined. I'm still learning. Not sure how simple it is to replace something like that myself. Was reading how the cabin air filter can be reached right through the glove box. That sounds easy enough I'm not going to pay them to do that.

 

Good to know! I skipped having them replace it since they were both replaced last year. Going to look up how to access them and see for myself rather they need replaced or just cleaned.

 

Toyota dealership in Fresno, CA. Haven't found a local mechanic yet that works on hybrids.
I had them pop the hood and let me look at the belt myself. It is just barely beginning to show some signs of wear, tiny cracks and such. So it didn't need replaced yet. Just trying to scare me probably...