If you are using Apple's Safari browser and you are seeing the message that "No authorized session exists. This is most likely caused by your browser blocking third-party cookies. Please adjust your browser settings and try again." the way to fix this is by adjusting your Privacy settings in the Safari browser.

From the Safari menu select Preferences and then click on the Privacy tab.

Uncheck the option to Prevent cross-site tracking for the Website tracking setting.

Reload the page and try again.