Incomplete Installation and Missing Files Specific to My Epic Creator Account Preventing Proper Use of Fortnite and UEFN Since October 2023

Since October I’m experiencing very similar if not the same issue with all of my UEFN projects – of which most contain no Verse code. All of my three Windows 10 Pro 22H2 dev workstations appear to be having the same problem with plain vanilla installation that got auto-updated last year and now looks incomplete although Epic Game Launcher verification detects zero problems.

Yet, after launching UEFN is see these many (42) Load Errors that skip many /Game/Effect packages like:

While trying to load package /Game/Effects/Fort_Effects/Gameplay/Pickups/Effects/NS_Pickup_RareAmbient, a dependent package /Game/Effects/Niagara/DynamicInputs/TimeOfDay/FNTimeOfDayScalar was not available. Additional explanatory information follows:
FPackageName: Skipped package /Game/Effects/Niagara/DynamicInputs/TimeOfDay/FNTimeOfDayScalar has a valid, mounted, mount point but does not exist either on disk or in iostore. The uncooked file would be expected on disk at ‘C:/Epic/Fortnite/FortniteGame/Content/Effects/Niagara/DynamicInputs/TimeOfDay/FNTimeOfDayScalar.uasset’. Perhaps it has been deleted or was not synced?

Since then, I cannot enter any Live Edit or interactive project session in Fortnite as I run into two types of Asset Check issues (600+ in total) like:

LogValkyrieValidation: Error: Soft package /a8210d3a-42c7-90a6-1cc0-a0ae49ff81e0/Levels/Landscape is not referenced by any soft object path in asset …

LogValkyrieValidation: Error: Found disallowed object type /Script/Landscape.Landscape:PersistentLevel.Device_Collectible_Object_V2_C_UAID_3085A9982C48DAEB01_1534714704, Referenced by:content/externalactors/levels/landscape/9/5l/djkx2ltgdvn4drcjg63eou.uasset (Device_Tracker_V2_C),content/externalactors/levels/landscape/0/fo/j3rbhhnzp2wk5k6cvhyvg2.uasset (Device_AnalyticDevice_V2_C), Plugin mount point:/a8210d3a-42c7-90a6-1cc0-a0ae49ff81e0.

I suspect such error is throw for (virtually) all objects and devices in the scene. I puzzled how all my projects seem the have gotten inconsistent on the same date and upgrade of UEFN…

No response yet on these bug reports thus far: