This is now the second GQ in a row where we have completed the task, but the GQ will not finish. It just sits in the Quest menu, all lit up, and sparkles when you click on it.
I cancelled it the 1st time around as there was a possibility that the recent game ban of a player may have caused it to mess up, but this Quest did not start until after he was removed from the Guild, so should not have been affected.