Cookies Required to Use Safari

Issue:

I am getting a message "Cookies Required to use Safari" when I try to login to the support portal. Screenshot below. How can I can I login?

Environment:

Safari on a Mac

Resolution:

To anyone using Safari on a mac, you can fix this by going to:

Safari -> Preferences -> privacy -> Website Tracking -> Prevent cross-site tracking. 

Uncheck the Prevent Cross-Site Tracking as shown below.

Fully quit Safari, Restart it, and the cookies message on log-in goes away.

Cause:

Prevent Cross-Site tracking settings in Safari browser.