Summary
Hi there,
Unreal Launcher doesn’t work on my fresh installation of Windows 11.
On first launch after a clean install, the Engines dropdown (top-right of Library page) never populates, and both My Projects and Fab Library are stuck permanently on “Discovering Content…”.
What I tried so far:
Checked EpicGamesLauncher.log — LogCommunityPortalAppManager is permanently stuck at EoshState = Enabled with FabBuildsState != Succeeded, blocking all EOSH content reconciliation.
Traced this to a GetVaultLibrary OSS call that fires an MCP request to https://www.fab.com/e/accounts/<id>/ue/library?count=100 — the log shows "Queuing" and "Running" for this request, but it never logs a success or failure. It hangs indefinitely with no error, timeout, or retry.
Also saw dozens of LogSelectiveDownload: SDMeta download failed ... falling back to EMS warnings for every engine version, and LogInit: Error: WinPlatform::FixLauncherInstallDirectoryPermissions: SetNamedSecurityInfo failed with 5 on non-elevated launches — ruled both out as non-fatal noise (issue persisted identically on an elevated run with no permissions error).
Cleared %LOCALAPPDATA%\EpicGamesLauncher\Saved\webcache* and let it rebuild — no change.
Verified network connectivity directly: all relevant Epic hosts (account-public-service-prod03, launcher-public-service-prod06, artifact-delivery-service-public-prod, datarouter, CDN hosts, and www.fab.com itself) connect over HTTPS in under ~1.2s, including a manual request to the Fab API path that returned promptly (404, as expected without valid auth) — ruling out DNS/firewall/proxy/TLS-interception issues.
Confirmed the account and content are fine server-side: signed into unrealengine.com and fab.com in Chrome with the same account — library and content displayed correctly on both sites.
Did a full clean uninstall (MSI uninstall of both Epic Games Launcher and Epic Online Services) plus manual removal of all leftover folders (Program Files (x86)\Epic Games, ProgramData\Epic, AppData\Local\EpicGamesLauncher/UnrealEngineLauncher) and registry keys (HKCU/HKLM\SOFTWARE\Epic Games), then reinstalled fresh from epicgames.com. Issue is identical on the clean install.
Environment:
Fresh Windows 11 25H2 install (build 26200.9168), not an Insider/Preview enrollment
Epic Games Launcher version 20.2.1-56875188
EOSH (Epic Online Services Host) version 5.5.0
No third-party antivirus/VPN/proxy — Windows Defender only, Controlled Folder Access off
This looks like a client-side bug in the desktop launcher’s EOSH/Fab library sync (GetVaultLibrary) — the request is sent but the response is never processed, with no error surfaced anywhere. Since the account/website work fine and network/permissions/cache are all ruled out, this doesn’t appear to be fixable from the user side.
Thanks,
Yurii
What Type of Bug are you experiencing?
Other
Steps to Reproduce
n/a
Expected Result
n/a
Observed Result
n/a
Affects Versions
5.8
Platform(s)
Windows
