FAB Asset missing manifest won't download

[BGTITAN-DENIS]

Summary

Purchased this asset:

Fab

Trying to add to my project fails. Log shows 404 Manifest missing:

-LogPortal: FCommunityPortalOSSImpl::RequestAppManifest 89efe5924d3d467c839449ab6ab52e7f:fb09f565292047f5bfe923de842c710d:Militaryf9602dec6487V2 1

-LogPortal: Display: FCommunityPortalOSSImpl::RequestSignedDownload using FAB service to retrieve manifest info

-LogOnline: Verbose: OSS: Starting RequestArtifactManifest request.

-LogOnline: VeryVerbose: MCP: Queuing Mcp request for user=9fb96b786b49436f810035f196385457 url=https://www.fab.com/e/artifacts/Militaryf9602dec6487V2/manifest

-LogOnline: VeryVerbose: MCP: Running Mcp request for user=9fb96b786b49436f810035f196385457 url=https://www.fab.com/e/artifacts/Militaryf9602dec6487V2/manifest

-LogOnline: Warning: OSS: Invalid response. CorrId=UE4-64afe2cb6e4460715dbfe78255c6dab7-15B754997C4EEA24C49E95912E6BE94A-257727BCA24BBB09E595369A71E674CF code=404 errorcode=JsonErrorUnknownCode errormessage=Server error of type JsonErrorUnknownCode errorraw={“Not Found”:“Could not find any manifest download info with artifactId=Militaryf9602dec6487V2”}

-LogOnlineFAB: Warning: OSS: GetVaultLibrary_HttpRequestComplete - request failed

-LogPortal: Error: FCommunityPortalOSSImpl::OnHandleRequestFabManifestComplete failed! 0 0

-FCommunityPortalVaultCache: ERROR: Manifest download fail - 89efe5924d3d467c839449ab6ab52e7f:fb09f565292047f5bfe923de842c710d:Militaryf9602dec6487V2

What type of bug are you experiencing?

Purchasing

URL where the bug was encountered

Fab

Steps to Reproduce

1. Purchase this asset
2. Go to Fab library
3. Hit Add to my project

Expected Result

It downloads & adds the asset to project

Observed Result

doesn’t download, logs error in log file:

-LogPortal: FCommunityPortalOSSImpl::RequestAppManifest 89efe5924d3d467c839449ab6ab52e7f:fb09f565292047f5bfe923de842c710d:Militaryf9602dec6487V2 1

-LogPortal: Display: FCommunityPortalOSSImpl::RequestSignedDownload using FAB service to retrieve manifest info

-LogOnline: Verbose: OSS: Starting RequestArtifactManifest request.

-LogOnline: VeryVerbose: MCP: Queuing Mcp request for user=9fb96b786b49436f810035f196385457 url=https://www.fab.com/e/artifacts/Militaryf9602dec6487V2/manifest

-LogOnline: VeryVerbose: MCP: Running Mcp request for user=9fb96b786b49436f810035f196385457 url=https://www.fab.com/e/artifacts/Militaryf9602dec6487V2/manifest

-LogOnline: Warning: OSS: Invalid response. CorrId=UE4-64afe2cb6e4460715dbfe78255c6dab7-15B754997C4EEA24C49E95912E6BE94A-257727BCA24BBB09E595369A71E674CF code=404 errorcode=JsonErrorUnknownCode errormessage=Server error of type JsonErrorUnknownCode errorraw={“Not Found”:“Could not find any manifest download info with artifactId=Militaryf9602dec6487V2”}

-LogOnlineFAB: Warning: OSS: GetVaultLibrary_HttpRequestComplete - request failed

-LogPortal: Error: FCommunityPortalOSSImpl::OnHandleRequestFabManifestComplete failed! 0 0

-FCommunityPortalVaultCache: ERROR: Manifest download fail - 89efe5924d3d467c839449ab6ab52e7f:fb09f565292047f5bfe923de842c710d:Militaryf9602dec6487V2

Platform

Unreal Engine 5.4.4

Operating System

MacOs Sonoma 14.5 M2 Max

[BGTITAN-DENIS]

Solution found. It might be all Mac users who can’t download any FAB Unreal Engine assets. Why? Because ALL of the UE assets download manifest on FAB only list platform of [“Windows”]. Epic Game launcher requests mac as platform that leads to a 404.

SOLUTION:
Create scripting overwrite using a tool like Proxyman. Here’s what I had to do to fix this, simply overwrite the initial manifest request platform to mac, now magically everything works.

my setup:

[Tyler_X]

@BGTITAN-DENIS We are currently looking into this, and will let you know as soon as we have an update!

[Tyler_X]

The team has identified an issue that is causing some Unreal Engine format products to be unable to be downloaded through Macs, and are looking to roll out a fix for this soon! Thank you for reporting this!

[Tyler_X]

We have deployed an update to correct this issue. Please let us know if you have any further problems downloading from Mac devices.

[r0bray]

@BGTITAN-DENIS

It might be all Mac users who can’t download any FAB Unreal Engine assets. Why? Because ALL of the UE assets download manifest on FAB only list platform of [“Windows”]. Epic Game launcher requests mac as platform that leads to a 404.

This is not fixed. I have downloaded over a dozen asset packs on my Windows laptop that are giving me “LogFab: Error: Invalid Manifest” errors on my Mac laptop.

[Seto]

It’s not fixed.
Official examples are not able to download. ML Deformer Samples, Valley of the Ancient, Electric Dream Env.

[PRP1986]

I’m having the same issue. Many of my assets momentarily show as downloading before disappearing from the download queue. The log shows ‘ERROR: Manifest download fail’.

I’m also on a Windows laptop so it is not a Mac only issue.

[Manchey]

I was having the same problem and this solution worked for me! At first it still was not working but after I enabled SSL Proxy to see the HTTPS Response, it started downloading for me. Thanks for the tip!