Dreaded VSP Serial Port Connection Error

Just got a 6300 running 1.9.13.89 on Windows 10 with a recent complete reset.
Trying to add a PTT port using CAT to run various digital programs but keep getting the serial port connection error.
I have done a VSP repair and reboot without success. Have search and found several of the previous post regarding solutions, none have worked.
COM4 is currently the CAT port with Auto Switch TX but JS8Call is complaining it can't PTT on that port. That's when I tried to add a PTT port.