Having trouble creating spell groups

[SwordShadesOfSunset]

With abilities I can create groups within the ability popup and I get the "create name for group" popup.
But with spells it does not allow to create groups within the spell book popup and I can't create it in the hot bar either. The hotbar icon gets the arrow image like it's a group, but there's no unfolding that reveals the spells for a group. It only casts the spell that is the icon image for the group.

[Truinto]

A couple days ago I pushed an update and made sure this works. I suspect that you have another mod with an old CodexLib.dll. Unfortunately the versioning routine broke for unknown reasons. So it is random which version gets prioritized. You can fix that by ensuring that every local copy of that file is identical.
Please search for CodexLib.dll in all your mod folders and copy the most recent over all other copies. Let me know if that worked.

[SwordShadesOfSunset]

@Truinto The only CodexLib.dll I've got is from your mod. There's other dll files, but not CodexLib. The other mods I have are customnpc portraits, dragonfixes, dragonlibrary, mod menu, Toybox and the woljif romance mod.

[Truinto]

So. I tested it again and I find no issue whatsoever. I tried multiple times with different approaches, including with a new save. But it just works.
Please try to narrow down your issue. I cannot help you otherwise.