Well, this doesn’t seem like the spellbook included, so I would say that something went wrong with the migration…
First of all, if you open the spell book widget (UI_Kit/Widgets/Window/ExampleContent/SpellBook), and click on one of the spells (they should all be red faces), is the “Spell Actor Class” variable set? (i’ll include a screenshot)
Every row should have a different class. If everything there is set correctly, is the relevant spell correctly setup? (screenshot 2)