hi, 
about 2 days, oqueue says me that "battletag missing or invalid" on my main character, but there are no problem with my alts, the addon works correctly. 
i tried to uninstall and reinstall it but nothing changed. 
please, help me. 
(sorry for my quite bad english, I hop that you understood my problem.)
kroellete

Having the exact same problem here dude, since I updated Oqueue :/

When you log into the game on the character which is having the issue, open your friends list. Towards the top it should display your battle tag. If your battle tag is not displayed, then you are not connected to Battle.net on that account. 

If your battletag is displayed, then you can try deleting your WTF saved variables files in your WTF folder which pertain to that character. 

My battle tag was correctly displayed. 
Today, i reconnect and the problem is solved... 
I didn't do anything ...