Zwift running but can't see it

hi Zwifters. I have an issue with windows 10 when zwifting. for a few months I had no issues. When I open the zwift app now, I can log in, and click ‘lets go’. After I click lets go the zwift music starts but the actual screen/app itself is totally blank. I mean blank by it’s just showing my desktop if I click roughly where the ride button is I can here the zwift noise that I’ve clicked it. I can’t even click on any desktop icons or anything When I try and move through apps (alt+tab) the ziwift tile is just dark, and that’s the only way i can get to the task manager to close zwift. it doesn’t show not responding or anything. any help? i’ve un-installed it that didn’t work.