Seamless, Proper Loading Screens! [Play Movies, Audio & Animated Widgets!]

[Bob3DGames]

Hello,

I have a problem with the TheJamsh’s plugin version of this and I have no idea what’s going on.

I’ve put the plugin in the project’s plugins folder and compiled the solution in VS, and the loading screen settings appear okay in project settings in EU, so no problem there. And when I start the game up in standalone the startup screen with the throbber works and I get to my empty level with my UMG main menu.

However, when I click on my New Game button, which uses an OpenLevel node the UMG widget blueprint, it shows the loading screen for a second or two, switches to unmaximised window containing just black and crashes. The following error report is then displayed:

Assertion failed: IsInRenderingThread() [File:D:\Build++UE4\Sync\Engine\Source\Runtime\Engine\Private\SceneUtils.cpp] [Line: 683]

UE4Editor_Core!FWindowsErrorOutputDevice::Serialize() [d:\build++ue4\sync\engine\source\runtime\core\private\windows\windowserroroutputdevice.cpp:79]
UE4Editor_Core!FOutputDevice::LogfImpl() [d:\build++ue4\sync\engine\source\runtime\core\private\misc\outputdevice.cpp:71]
UE4Editor_Core!AssertFailedImplV() [d:\build++ue4\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:101]
UE4Editor_Core!FDebug::CheckVerifyFailedImpl() [d:\build++ue4\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:439]
UE4Editor_Engine!FScopedGPUStatEvent::Begin() [d:\build++ue4\sync\engine\source\runtime\engine\private\sceneutils.cpp:724]
UE4Editor_SlateRHIRenderer!FSlateRHIRenderer::DrawWindow_RenderThread() [d:\build++ue4\sync\engine\source\runtime\slaterhirenderer\private\slaterhirenderer.cpp:656]
UE4Editor_SlateRHIRenderer!FSlateRHIRenderer::DrawWindows_Private() [d:\build++ue4\sync\engine\source\runtime\slaterhirenderer\private\slaterhirenderer.cpp:1154]
UE4Editor_MoviePlayer!FMoviePlayerWidgetRenderer::DrawWindow() [d:\build++ue4\sync\engine\source\runtime\movieplayer\private\defaultgamemovieplayer.cpp:872]
UE4Editor_MoviePlayer!FSlateLoadingSynchronizationMechanism::SlateThreadRunMainLoop() [d:\build++ue4\sync\engine\source\runtime\movieplayer\private\movieplayerthreading.cpp:146]
UE4Editor_MoviePlayer!FSlateLoadingThreadTask::Run() [d:\build++ue4\sync\engine\source\runtime\movieplayer\private\movieplayerthreading.cpp:177]
UE4Editor_Core!FRunnableThreadWin::Run() [d:\build++ue4\sync\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:96]

Any idea what the issue might be? Hopefully I’ve just missed something obvious in setting it up!

Regards.

PS Sorry about the smiley faces, I don’t know how to get rid of them.