Adobe Illustrator Mac shows a WHITE SCREEN no matter what I do, what file I open, what option I set.

Since last update, and with new current update, whenver I open Adobe Illustrator  on my iMac Pro, i get a white screen if I try to do anything to any file I open, no matter how simple or complex.

Adobe Illustrator ends up crashing every time. This works perfect on the PC I'm using. I've been using illustrator for over 15 years and have never seen this issue.

I've tried the following and they do not solve the issue:

- remove and reinstall

- pixel preview (on or off)

- Overview Print

- numerous files (same on every one)

Video showing the issue (6 months and running):

My Machine.

iMac Pro (2017)

3.2 GHz 8-Core Intel Xeon W

64 GB 2666 MHz DDR4

Radeon Pro Vega 56 8 GB