We now have accelerated paint working on Mac! We’ve updated the Mac version of the WebUI plugin to CEF 128 and setup full accelerated paint support for Metal:
This release is now live on Fab for 5.6 and will be updated on previous engine versions such as 5.2-5.5 in the next few updates.
Annoying bug: editor crashes if you have this plugin installed and try to open Quixel Bridge. Using 5.5.
Hi,
I’m experiencing a critical crash with the WebUI plugin on Unreal Engine 5.5. The plugin was working fine previously, but after re-enabling/reinstalling it, I’m now getting a CEF initialization failure whenever I try to use it.
Error Message:
Assertion failed: bCEFInitialized
[File:D:\build\U5M\Sync\LocalBuilds\PluginTemp\HostProject\Plugins\WebUI\Source\WebBrowserUI\Private\WebInterfaceBrowserSingleton.cpp]
[Line: 473]
My Setup:
Engine: Unreal Engine 5.5
Plugin: WebUI (latest version from Marketplace, installed for 5.5)
OS: Windows
What I’ve Tried:
Completely uninstalled and reinstalled the plugin (using Epic Launcher → Installed Plugins → Remove, then reinstalling)
Deleted project Binaries, Intermediate, and Saved folders multiple times
Added Windows Defender exclusions for the plugin folder
Disabled the built-in Web Browser plugin to avoid conflicts
Verified libcef.dll exists in the plugin’s Binaries/Win64 folder
The Issue: The error occurs when the WebInterface widget tries to construct. CEF fails to initialize, causing an immediate crash. This same setup worked before, so something changed either with the plugin version or my system.
Questions:
Is there a known compatibility issue with UE 5.5?
Are there any additional dependencies or setup steps required for 5.5?
Has anyone else experienced this after reinstalling the plugin?
Any help would be greatly appreciated. This is blocking my entire project right now.
Thanks!