Not usable with current weapon set settings

I have skill gems with "Not usable with current weapon set settings" icon and no interaction with them changes this. I can still use this skills. I do not understand why they are "not usable" if it is not. Seems like a bug. Skills set to ws 2.
Screen with ws2 setup and working skills on the right:

I have this same issue. Hopefully someone has some insight

Same here!
I once fixed it by un- and reequiping my ring. But it doesn't work this time (and neither did any attributes change)

currently experiencing the same issue now, swapped out my Thrillsteel helmet with Alpha's Howl and currently holding a guiding palm but all are within parameters. But then the skills are now saying that

I confirm the exact same issue still happens to me. Not fixed yet

Same issue with Basic weapon skills. No way to set the skill setting..

For anyone running into this I found a way to "fix" the problem. It is indeed a bug from what I can tell.

The issue happened when I equipped an Amulet that took away 23 Dexterity but added 13 Strength and Intelligence.

That put my character at 180 Dexterity however my bow only needed 163 Dexterity to use. That's why I was still able to shoot my bow and use all of my skills. So the bug has something to do with JUST the skill screen not accounting for a Dexterity increase from my gear.

When I added some more Dexterity (by refunding passives) it all started working again.

But... that's still a big problem when trying to tune your stats. I had enough Dexterity for my bow and I shouldn't need to add more just to fix the skill screen.

So I did a little math to figure out what stat was being ignored but I couldn't find it.

My bow's Dexterity requirement is 163. When my Dexterity is 185 then the skill screen is broken. When my Dexterity is at 190 then the skill screen works again.

So basically +23-27 Dexterity is being ignored from somewhere. That must be the case because +5/-5 Dexterity is what fixes/breaks the skill screen.

Looking at my gear I'm only getting Dexterity from two places. My Quiver provides +29 Dexterity. Then I have a ring that provides +13 to all attributes. I also have a passive skill node that provides 8% Dexterity. Everything else seems to be from small flat passive nodes.

So it's not obvious what exactly is being ignored here.

HELLO GUYS, I`m RUSSIAN EXILE AND I FIND THE ANSWER ON THIS QUESTION. THERE ARE BUG WITH ANY AURA. IF U TURN IT OFF, GAME DISABLES THEM IN UR WEAPON SETS ONE AND TWO. BEFORE THEY FIX, JUST PUT THEM ON IN WEAPON SETS ONE AND TWO FOR THIS USE ARROW NEAR DAMAGE AND IN OPENED WINDOW ABOVE 8U HAVE TWO CHECK MARKS. TY AND GOOD LUCK FROM RUSSIA https://postimg.cc/2bBgBRXy

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Чуть более понятно опишу: открываете набор умений по кнопке "G", справа стрелочка, которая разворачивает подробные характеристики умения, тыкаем. Справа раскрывается подробная табличка. Внизу этой таблички есть надпись: "Используется с набором оружия" и 2 галочки. Проставляем обе галочки. Выбираем другое умение, повторяем.