Unreal Engine Issues
Unreal Engine Issues
Opening a widget blueprint on Linux causes editor to crash
UE - Platform - Linux - Aug 25, 2016The editor crashes when attempting to open a widget blueprint. ...
iOS builds fail on Windows.
UE - Platform - Mobile - May 15, 2026Loading Windows installed iOs mobile provisioning profiles fails at start of iOS build from windows machine. This due to a recent change that attempts to load PKCS12 from mobileprovision files. Thes ...
HTTP If-None-Match response code is incorrect on Macintosh
Tools - Sep 22, 2016Macintosh implementation for HTTP requests handle If-None-Match against ETags differently than Windows implementation. ...
Crash launching UE4Editor.exe from cmd.exe with -dx12 argument
UE - Graphics Features - Feb 3, 2017My Nvidia driver is our current approved driver: 378.49 ...
GameCenter does not login on Match3 startup on iOS
UE - Platform - Mobile - Aug 23, 2016When launching on or opening a packaged UnrealMatch3 project GameCenter does not login for the paired account. This causes Leaderboards and Achievements to appear blank. Tested on iPhone6s_6240 OS: ...
In Packaged builds, Chaos Cache Manager can't animate Geometry Collections with Nanite Enabled if Cache Mode is set to Static Pose
UE - Simulation - Visual - Feb 27, 2025In Packaged builds, Chaos Cache Manager (CCM) can't animate Geometry Collections (GC) with Nanite Enabled if Cache Mode is set to Static Pose. The licensee tried to animate a CCM using Sequencer onl ...
Crash editing Primary Assets Label in ShooterGame assets in 5.8
UE - Content - Sample - Jun 5, 2026BP - Exclusive nativization will fail at cook time if a BP class includes a ChildActorComponent with a Data-Only BP set as the ChildActor class.
UE - Gameplay - Blueprint - Apr 20, 2017Note: This does not occur when the nativization mode is set to "Inclusive" in the Project settings. Current workaround: Ensure that the ChildActor class is NOT a data-only Blueprint, by adding scri ...
Niagara and Groom causes exception crash on Launch when using
UE - Simulation - Physics - Mar 2, 2020Trying a Launch after every step shows that the problem occurs as soon as the GroomAssetSystem is added to Niagara. If the GroomAssetSystem is removed, the game launches fine (but the hair doesn't m ...
Linux crash when Exporting content
Tools - Jun 2, 2016When the ExportAll window is opened, changing the file type filter and attempting to edit the chosen file field causes the editor to crash. ...