I've been playing on Torchbearer and Excelsior since last week, Indomitable this morning.
After the most recent server restart, when I attempt to connect to a Shard (any of the 4), I get this error popup.
There's this post from Apr 25 that refers to changing the "tequila.xml" file to fix this.
https://score.savecoh.com/index.php/topic,78.msg680.html#msg680
I renamed "tequila.xml" and tequila.exe recreated it exactly the same as before and still had the error.
I compared my "tequila.xml" to the one above, lots of changes. But most important, there's a change in the "-auth" IP for the command line options.
I'm not going to install that sort of fix without verification it's a safe fix.