Recently attempting to cast invisibility and/or Improved Invisibility. Unable to do so, getting the message "No uses or preparations left for that spell.", despite having them slotted.
Cleric with the Trickery domain.
Have been able to cast fine previously, possibly before the latest module update?
Re-slotting the spells and resting does not assist.
Changing areas does not assist.
Re-logging does not assist.
EDIT:
Fix tool does not assist.
DM killed/resurrected does not assist.