Seems like there is a log-in issue for certain accounts. I am not able to queue on this account, but I can queue on another account using the same computer. Here are 2 other threads of people having the same issue:
https://forum-en.gw2archive.eu/forum/support/tech/Error-42-0-9001-4409-101-When-Queuing/
https://forum-en.gw2archive.eu/forum/support/bugs/PvP-Queue-Unable-to-gain-access-error/