Good afternoon and thank you for posting on the Final Fantasy XIV Technical Support Forums.

There is currently maintenance for the new patch and is scheduled to be completed at 3am (PST) on September 18th. You will not be able to log in until then. For more information regrading the maintenance, please see this lodestone announcement: https://na.finalfantasyxiv.com/lodes...1ae053c2203f69

The error you receive is what you should be seeing as the servers are currently down.

Thank you for visiting the Final Fantasy XIV Technical Support Forums.