Did you buy the skill books from the boutique and have them in your inventory? If not then you should, that would fix the problem.
I buy it from Boutque using my event gold
Do you have gold and spirit?
Can you screen shot your inventory to confirm you have the correct books? Did you buy sage my accident?
i buy Dark books from Boutique
Please screenshot your inventory, with at least one book highlighted. Make sure to include your coins.
heres my screenshot
How many coins do you have? Not in note form, in coins.
18m gold coins
Try a different resolution if you can. To me it looks like the UI isn't big enough to show the up arrow that lets you learn skills. If that doesn't work try to verify your game files and as a last resort reinstall if you can. The issue is mainly just a UI size issue or client file issue it seems.
Lol TY fix now