Authorization issues?

I have 4 mac's authorized through the iTunes store. My main mac is no longer able to downloard or play any iTunes purchase that is stored in the cloud. When I attempt to play or download, I receive the following:

When I attempt to do so, this is what I receive:

Wha??!!

The computer is authorized and plays iTunes purchases that are stored on the hard drive. I have tested the other 3 macs, all iPads, and iPhones, Apple TV's, and those devices are all able to access and download all iTunes purchases from the cloud.

Here is what I have tried, and none have proven successful (which is why I'm here):

-Re-start

-Shut down, start computer

-De-Authorized then re-authorized computer with issue

-Used Disk Utilities and repaired permissions

-Deleted SC folder in Users folder, then re-authorized computer in iTunes

-checked to make sure I have the latest version. 12.3.3.17 is the latest.

-Said in appropriate words for my children to hear

-emailed Apple Support

Any thoughts regarding this would be greatly appreciated.