I had this issue today, then I got curious and went into the game folder. In the install directory, is the configuration exe. I launched it, changed the resolution to match my screens and ran the game. I could now access the skill/spells menu without issue.
Yeah i discovered that yesterday so at least that has a workaround, now is just the weapons skills permanently disappearing which was addressed in a patch that came out on release day. No clue if they're going to update the game here though.
Seems there's a bug/glitch in the inventory and skills though...
Edit: fixed in cfg
Mine using ACER XB271HU monitor:
https://gyazo.com/37c3f31c3f144c1cd37a014d2ef96420