I'm facing a strange problem here. Yesterday everything worked fine when debugging a SharePoint app in Visual Studio but today I'm stuck.
Every time I want to debug the app in Visual Studio the "Connect to SharePoint" Dialog pops up as usual. But now it stays blank and does not load any data. Here you can see a picture of the Dialog:
I just waited 15 minutes but nothing happened. This dialog usually shows an O365 credential form that you have to fill out to connect Visual Studio to the O365 Server.
I did not change the Site URL at all or made any other changed to the project. I can also not access visual studio as that Dialog blocks any access to it.
Is there any way to find out what's going on?