"Cannot Use that Class" message????

[Elysaine]

I have had issues with gear sets not equipping if I have removed something from the armoury chest but never not being able to use a class for no reason. That is an odd glitch.

Same here. If one item of a created set is missing it won't equip anything of said set. I find the whole set system quite bad. I mean items are not listed as being part of a set for instance. So it's very easy to sell/store an item somewhere without realizing it belongs to a set. And making that set unequipable.