Premiere Pro CC 2018, Preview play button broke
I'm having issues with premiere pro. Last month I got a new Alien Area 51 computer with Nvidia GeForce GTX 1080ti, 16GB system DRAM, 1TB SSD. When I installed PP it was working properly for about 2wks, but now i'm having lots of different issues. These problems have changed over the last week, but seem to be related to the user interface. The current symptom is it won't play my video in preview at all when editing, which makes PP useless. Also, when in the Effects workspace, if I click the Editing workspace option at the very top, the whole screen goes grey, absolutely nothing on the screen. To get things back I have to go to the menu bar and select Window>Workspace> then select a different workspace.
Another symptom I had in the beginning of these problems, but has gone away, is the timeline bar wouldn't move when I tried click and drag left and right, moving around on the timeline. That seems to have fixed itself, but now i can't preview any clips with the play button while I'm editing. Clicking the space bar changes the play button (arrow right) to a stop button (square), and vice versa, but the video or timeline won't play, regardless.
When I type C the cut tool works fine, and the V move tool works too, I can click and drag clips around OK. A still video image does display in the play window, and when I drag the timeline right and left the video does advance and reverse like normal. It just won't play any clips in the preview window when I click the play button (arrow right).
For the record I made sure I"m running the most current version Nvidia driver for this, as well as the most up to date version of PP with all updates.
I thought this might be a DRAM issue, but Adobe says only 8GB is required and a minimum of 16GB is acceptable. I'm not running any other apps at the same time so I assume this amount DRAM should suffice.
Any ideas? Anyone else seeing this?