I don’t think it’s got anything to do with persistence (none of the stuff I posted mentions persistence), all my persistent data is in one file and hasn’t been changed since that release, nor has the file been removed.
Here’s the missing error anyway:
Fortnite Projects/MyProjectName/Plugins/MyProjectName/sys/published/Content/mob_manager_device.verse(16,5, 16,61) : Script error 3593: Definition (/brickwall@fortnite.com/MyProjectName/mob_overhead_data:)OverheadMaterial is accessible from subpaths of /brickwall@fortnite.com/MyProjectName, but depends on (/brickwall@fortnite.com/MyProjectName/Assets:)M_MobOverhead_material, which is only accessible from subpaths of /brickwall@fortnite.com/MyProjectName/Assets, /brickwall@fortnite.com/MyProjectName. The definition should be no more accessible than its dependencies.
Fortnite Projects/MyProjectName/Plugins/MyProjectName/sys/published/Content/LabyrinthAbilities/Abilities.verse(16,45, 16,49) : Script error 3506: Unknown member `Heal` in `AbilityIcons`.
Fortnite Projects/MyProjectName/Plugins/MyProjectName/sys/published/Content/LabyrinthAbilities/Abilities.verse(29,45, 29,55) : Script error 3506: Unknown member `SpeedBoost` in `AbilityIcons`.
Fortnite Projects/MyProjectName/Plugins/MyProjectName/sys/published/Content/LabyrinthAbilities/Abilities.verse(46,45, 46,49) : Script error 3506: Unknown member `Stun` in `AbilityIcons`.
Fortnite Projects/MyProjectName/Plugins/MyProjectName/sys/published/Content/LabyrinthAbilities/Ability.verse(9,43, 9,47) : Script error 3506: Unknown member `Heal` in `AbilityIcons`.
Fortnite Projects/MyProjectName/Plugins/MyProjectName/sys/published/Content/LabyrinthStatusEffects/StatusEffect.verse(23,43, 23,47) : Script error 3506: Unknown member `Heal` in `AbilityIcons`.
Fortnite Projects/MyProjectName/Plugins/MyProjectName/sys/published/Content/LabyrinthStatusEffects/StatusEffects.verse(14,45, 14,49) : Script error 3506: Unknown member `Heal` in `AbilityIcons`.
Fortnite Projects/MyProjectName/Plugins/MyProjectName/sys/published/Content/LabyrinthStatusEffects/StatusEffects.verse(31,45, 31,51) : Script error 3506: Unknown member `Poison` in `AbilityIcons`.
Fortnite Projects/MyProjectName/Plugins/MyProjectName/sys/published/Content/LabyrinthStatusEffects/StatusEffects.verse(48,45, 48,50) : Script error 3506: Unknown member `Bleed` in `AbilityIcons`.
Fortnite Projects/MyProjectName/Plugins/MyProjectName/sys/published/Content/LabyrinthStatusEffects/StatusEffects.verse(65,45, 65,48) : Script error 3506: Unknown member `Ice` in `AbilityIcons`.
Fortnite Projects/MyProjectName/Plugins/MyProjectName/sys/published/Content/LabyrinthStatusEffects/StatusEffects.verse(84,45, 84,51) : Script error 3506: Unknown member `Webbed` in `AbilityIcons`.
Fortnite Projects/MyProjectName/Plugins/MyProjectName/sys/published/Content/LabyrinthStatusEffects/StatusEffects.verse(101,45, 101,52) : Script error 3506: Unknown member `Stunned` in `AbilityIcons`.
Fortnite Projects/MyProjectName/Plugins/MyProjectName/sys/published/Content/LabyrinthStatusEffects/StatusEffects.verse(133,45, 133,55) : Script error 3506: Unknown member `SpeedBoost` in `AbilityIcons`.
Fortnite Projects/MyProjectName/Plugins/MyProjectName/sys/published/Content/labyrinth_npc_device.verse(70,51, 70,68) : Script error 3506: Unknown member `NPCVendorParticle` in `Assets`.