lucky spell slot

Some spells require Spell Slots of a certain level, like the 2nd level Scorching Ray needing a 2nd Level Spell Slot or more to work, and not being able to be cast with a 1st Level Spell Slot.

The spell prevents them from regaining spell slots; that does not mean they cannot cast the same spell using a different spell slot.

From bg3.wiki. ... Level 1 Spell Slots Unlocked: 3 You gain an additional Level 1 Spell Slot. . Spells Known: 3 Choose 1 additional Spell from the Ranger Spell List.