Error: You cannot use this item....

I got this error, and I'm not sure how. I'm lvl 89, with enough stats.
I've googled, and none of the solutions I've read fixed it.

I've unequipped all my gears, removed all skills, changed to different char..

no dice....

Any help is much appreciated - Thank you.

Hey just wanted to add to this too I am also having the same issues with a pair of Cuffs. I meet all requirements for them, and I get the same error as the OP here. I hope someone can see this message and help us out.

Update!
I replace one of the gems and that fixed the problem.