No issues reported with Tranquility over the course of the last 4-5 hours.
Must have been networking somewhere between TQ and your computer.
Glad that it’s working again now! 
This thread was added on July 19, 2019, with posts from Sarno, CCP_Falcon.
We’re investigating reports of this now.
Moving thread from #customer-service to #technical-support.
We’ve implemented a potential solution to address reports of authentication failure and are currently monitoring the situation.
Investigating continued reports of authentication failure.
Alright, we’ll be posting further updates here;