[Critical] Failed to install module on host Error

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Publishing

Summary

We have a project that was working fine yesterday but today it’s down with a weird error. Last night was the 27.11 update. We use mostly Fab assets but made very few changes between yesterday’s test session and today and have removed all items that were changed. The error is so weird and vague it seems impossible to debug. How do we fix this?

Here is the full error:
Failed to install module on Host, url:installbundle:…/…/…/FortniteGame/Plugins/GameFeatures/a8ab4d64-471b-8387-1d15-0886e684ab34/a8ab4d64-471b-8387-1d15-0886e684ab34.uplugin?Bundles=a8ab4d64-471b-8387-1d15-0886e684ab34-https%3A%2F%2Fdatastorage-public-service-live.ol.epicgames.com%2Fapi%2Fv1%2Fredirect%2Ffortnite%2Fvalkyrie%2Fcooked-content%2Fa8ab4d64-471b-8387-1d15-0886e684ab34%2F27.11.29836234%2Fv4%2Feb8d887f-686d-4bb4-9a8d-7e07012286b4%2F?VkResolvedModule=%7B%0A%09%22moduleId%22%3A%20%22a8ab4d64-471b-8387-1d15-0886e684ab34%22%2C%0A%09%22version%22%3A%204%2C%0A%09%22artifactId%22%3A%20%22■■■9e2a2-54c3-4d48-b7cb-7fb63e439d60%3Alinux-server%22%2C%0A%09%22cookJobId%22%3A%20%22eb8d887f-686d-4bb4-9a8d-7e07012286b4%22%2C%0A%09%22binaries%22%3A%0A%09%7B%0A%09%09%22baseUrl%22%3A%20%22https%3A%2F%2Fdatastorage-public-service-live.ol.epicgames.com%2Fapi%2Fv1%2Fredirect%2Ffortnite%2Fvalkyrie%2Fcooked-content%2Fa8ab4d64-471b-8387-1d15-0886e684ab34%2F27.11.29836234%2Fv4%2Feb8d887f-686d-4bb4-9a8d-7e07012286b4%2F%22%2C%0A%09%09%22manifest%22%3A%20%22%22%2C%0A%09%09%22files%22%3A%20%5B%5D%2C%0A%09%09%22totalSizeKb%22%3A%2012.5048828125%2C%0A%09%09%22manifestSizeKb%22%3A%200%2C%0A%09%09%22manifestDiskSizeKb%22%3A%200%2C%0A%09%09%22manifestDownloadSizeKb%22%3A%200%2C%0A%09%09%22installMetadata%22%3A%20%5B%5D%0A%09%7D%0A%7D, project:326a1181-40eb-01c2-cc3c-fc915f4c6c99, module:4396a674-422d-93a5-1bcf-44825aa5bc0c@2

Steps to Reproduce

Try to test the game by launching session

Expected Result

Not fail, or at least give an error that can be understood.

Observed Result

can’t test

Platform(s)

UEFN

Dealing with the exact same issue