D&D Rules and such…

Fantasy Grounds:

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Spell Scroll A spell scroll bears the words of a single spell, written in a mystical cipher. If the spell is on your class’s spell list, you can use an action to read the scroll and cast its spell without having to provide any of the spell’s components. Otherwise the scroll is unintelligible. If the spell is on your class’s spell list but of a higher level than you can normally cast, you must make an ability check using your spellcasting ability to determine whether you cast it successfully. The DC equals 10 + the spell’s level. On a failed check, the spell disappears from the scroll with not other effect. Once the spell is cast, the words on the scroll fade, and the scroll itself crumbles to dust.

TR;DR; You must have a level in a class that could cast that spell. And succeed a DC 10 + spell level Spellcasting Ability check if you cannot cast the required spell level.