Connect to Facebook window won't open...

[brice_31]

Operating System

Windows 10

My Question or Issue

 My account was linked to my Facebook page. To show a friend how to connect to facebook, I disconnected my account, thinking I'll be able to reconnect no problem. But when I clicked on "Connect to Facebook", nothing opened... I later realised that it actually opened, but it just wouldn't show the page. I tried alt+tab ing but it just doesn't work (as you can see on the screenshot)... I'm really annoyed by this... Please help me!