AV Event: Join As a Group Failed Bug

When queuing the AV event on an account without Battle for Azeroth or a Free to Play account you get “join as a group failed” error despite not being in a group.

It would seem that you must have Battle for Azeroth on your account to queue for the AV event. It is unclear if this is intended.

If this is in fact the case, can we please at least get an official confirmation.

Thank you for your time.