100% reproducible Login bug.
Since about 5/27/2015, this bug occurs every time I try to log in for the first time after restarting my computer. If I attempt to log in with my main account, I get an error and am unable to connect to the game -- and the client closes. If I re-open it and try again, I get the same bug. However, if I log in to another account, it will successfully log in. Then, if I close the game and restart the client, I am able to log in to my main account just fine.
I am only able to log in to my main after the other account has successfully logged in once. I haven't tried logging in to the other account first yet because I always forget about the bug...
I just thought I should report this bug, since it has happened every time since the above date. I can give more info about the wording of the error message and my dxdiag if you need it.