Stuck in Creative Cloud Installation (authentification)

Hey there,

unfortunately I'm stuck in the process of installing the Creative Cloud Application. To be more specific for some reason the Installer opens a tab in Firefox but doesn't seem to be able to "get" when I authentificate so it basically doesn't do anything afterwards. The screenshot shows the step I'm stuck at. I've tried everything in the troubleshooting (Cleaner Tool, fresh install) and it's a fresh Windows 10 installation so I'm not sure why it would not work.

Can you guys help me out? Thanks in advance!