Revit Collaboration Communicator doesn't log in once opened

Your Communicator for Autodesk Revit is not signing in. You have verified that you have:

1. Sign into your A360 from within Revit.
2. you're signed into A360 from the task tray    

The communicator for Autodesk Revit still looks as if you haven't purchased a license for Collaboration for Revit.

SOLUTION:

1. Make sure you are assigned a seat of the Collaboration for Revit. 
2. Make sure the Collaboration for Revit contract is assigned to a hub.
   1. Blog on how to setup a hub and assign seats.
3. Make sure you do not have more than one Autodesk sign in and password.
4. Make sure you do not have anything blocking the communication like antivirus, firewall or permissions.  Autodesk permissions.

From within Control Panel:

1. Set your User Account Control Setting (UAC) to never notify. Here is a link to how to turn off the UAC: Microsoft User Account Control Setting.
2. Go to Internet Options > Security tab > and click on Trusted Sites. Click on the Sites button and add the Autodesk website fttps://www.autodesk.com. Try to open the software again.
3. Go to Internet Options > Security tab > click on Internet and set this to medium. 
4. Go to Internet Options > click on the Privacy tab> uncheck "Turn on Pop-up Blocker"
5. Go to the Connections tab > click on Lan Settings. There should not be anything checked in this dialog box.