New Media Source Won't Scan

[KodiUser1138]

Thank the Maker, I think I figured it out. So to my future self, this seemed to be the solution.

Jellyfin can't acces Windows network share folders. 

1. On Windows Services.
2. Find "Jellyfin Server" service. 
3. Right Click on the service and go to "Properties".
4. Switch to "Log On" tab. Make sure "This account..." is selected and press "Browse".
5. Find the account with full network credentials by typing the username and click "Check names".
6. Select it and press OK. Hit Appy, then OK
7. Restart service.

I think I'm back!