Hi all! So I tried this solution:
7. "I cannot connect to the server / I get immediately disconnected"
Please try opening your Config.wtf file, and removing the server name completely. Restart your WoW client. If the issue persists, open the Config.wtf file and find the line "SET realmName ".....". If this line is present, make sure one of our realm names is inside the quotation. If it is "QA Test Realm ____", change it to the name of one of our realms. (If it is not present, add SET realmName "Desired realm" ). If you are still unable to connect, or need assistance, please pursue help in one of our support channels in Discord or the "Help and Support" subforum.
However, the issue still remains. Does someone have some insight to share? :-)