InDesign CC 2019 won't launch

My InDesign won't launch.
When I try to use inDesign an empty white box appears (see picture). When I close the white window the whole program crashes. I can click nothing else than the X on the window's left top corner.
I've tried reinstalling the latest version of inDesign CC 2019 (14.0) multiple times. I checked for the new updates on Creative Cloud. I've also reset my preferences when uninstalling. I even updated my Windows 10 but it didn't help either. I rebooted my computer over and over again. I'd really appreciate your help!
