Mirage Archer - Not usable with current Weapon set settings

From about 16h ago o got a strange behaviour from "Mirage Archer" skill that disable itself with note "Not usable with current Weapon set settings".
I've not changed anything , just removed the gem to "upgrade" it.
I've try to redo the gem, relog, remove all ghears and leave only a Magic crossbow ... but nothing work.

Stats are ok and just see the "Used with Weapon set:" I and II are "RED" empty and not more click-able ...


The other item i would like to notice is that "on dead" the crossbow reset it's status to default shot.


Other strange behaviour is if i use "Right Click" on Heral Skill Gem, it disable Used with Weapon set I & II instead of hust turn it off!


Can help me to identify the issue plz?

Thanks