I am running a raspi 4 with Jason KM4ACK's Build-a-Pi for many years now. I recently installed RaspiOS and BAP 3.2 which has VARA HF 4.6.5, VARA FM and VARA Chat. I assume VARA Chat is the same as VarAC(??)
VARA HF works through PAT Menu and flrig.
There is a separate VARA menu option VARA that has VARA HF, VARA FM and VARA Chat v 1.3.3.
I have found that using PAT Menu/VARA HF requires flrig, but VARA/VARA HF by itself runs without.
I have not been able to get VARA/VARA Chat do anything after the modem and window opens.
I have set PTT to CAT, the modem is on /dev/ttyUSB0.
When I select CQ or Connect, nothing happens.
So, finding this forum, I downloaded VarAC to the pi and extracted it to .wine/drive_c/VARA_AC .
I then ran wine VarAC.exe and got screens full of error messages about x11settings:X11DRV_ Failed to get L"\\\\.\\\DISPLAY1".
The VARA modem window opened, but with an error message saying there was another instance running. There wasn't.