All guests are done but the " complete all the quests" checkbkx is not checked
What happens if you click the green arrow on that task?
Could you also take a picture of the kingdom screen, showing the completed quests? Having both parts of this would either clearly show the bug to the devs (and thus speed up the fix) or would show something that you might have overlooked.
Definitely file a support ticket so @Kafka and/or other support staff can manually fix your account, since that does look weird:
Do you have all of the quests done? Maybe they have it set not to upgrade until you have every kingdom quest done?
Please contact our support at the link @Magnusimus provided above. Our team can fix this for you.