Pen pressure sensitivity not working photoshop 2020

I upgraded to Photoshop 2020  21.1.2

Since I  upgraded, I have had issues with the pen pressure sensitivity on my cintiq 27HD. Sometimes it works, but only for a few minutes. Then it will show an error/warning in the transfer brush settings. 

Any fixes for this? It's really messed things up and made it so I can't work. 

I am on an iMac OS Mojave (10.14.6) and have reinstalled new drivers, reset preferences and tried all different settings in preferences. If "Use Graphics Processor" is checked or not, no difference. 

Please get me a fix on this!