My MongoDB Compass does not start. It worked an hour ago, but now it shows this screen forever.

I tried to reboot. And even uninstalling and reinstalling Compass. But every time I run it, it just shows the loading screen and never starts. If I go to "Connect"> "Connect to ...", it just opens another window that does the same.
Version 1.10.9
Windows 10 x64
How can I get this program to start correctly? What should I research to try to figure this out?
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