Cannot launch an edit session

Summary

Every time I try to launch an edit session, I get slapped with this error.
The project validates.
There are no disallowed references.
There are no warnings or errors when opening the project.
There’s not a speck of verse written yet, this is just the final environment.

Here’s the error from the log:
PlatformCook: Error: We hit an error while cooking this content
PlatformCook: Error: errors.com.epicgames.content-service.cook_failure
PlatformCook: Error: CookJobId:f606a206-83de-442b-a67b-6f95ce215105
PlatformCook: Error: An error occurred while communicating with the game servers (failed to cook module 5cb6a817-4fb7-59d4-2678-adbfdaf22b69 (artifact e8d47486-6635-4a5d-9fe9-7c09acb80e45:linux-server) (cookJobId f606a206-83de-442b-a67b-6f95ce215105) with error code errors.com.epicgames.cookplugin.assetvalidationerror).

I’ve been able to get in-game with a significantly earlier snapshot of the project that’s just my landscape in the void, but obviously I need to get in-game with the current version of my project to make sure gameplay things like loot, quests, rewards, and NPCs behave correctly in the environment that I want it to happen in.

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Live Edit

Steps to Reproduce

Launch edit session

Expected Result

Edit session is launched and the island is loaded properly

Observed Result

Error is thrown, session remains connected, player is respawned, but the player is stuck in the creative lobby with the ability to edit it.
The island is never loaded.

Platform(s)

PC

Island Code

NA