Error when Launching / Failed Packaging

I’ve searched high and low for a solution to my problem, but I’m stuck and need some help.

I have a project that uses a third party library plugin that I’m developing. Everything works fine when previewing in the editor, either just in the viewport or as a standalone or VR. However, all goes to hell when I try and use the Launch feature.

The following issues pop out in my log:

LogInit:Display: Starting Game.LogLinker:Warning: Can't find file '/Script/U4DPlayer'

U4DPlayer is the name of my plugin, but I don’t seem to have any scripts by that name. Is this somehow missing or important? Can this warning be ignored?

LogProperty:Error: Struct type unknown for property 'StructProperty /Game/Blueprints/U4DDeveloperConsole.U4DDeveloperConsole_C:UpdateThreadsWidget.CallFunc_GetMetrixThreads_ReturnValue.CallFunc_GetMetrixThreads_ReturnValue'; perhaps the USTRUCT() was renamed or deleted?LogWindows:Warning: CreateProc failed (2)

This is being thrown by one of my blueprints. The struct in question is defined. I’ve tried replacing it, everything compiles fine. I also tried changing the LoadingPhase of the plugin to “PreDefault” which was suggested elsewhere with no improvement.

Any help is appreciated. Full log attached.link text

Ok, I think I have this sorted actually. The plugin type was “Developer”. I’ve switched it to “Runtime” so it’s actually available at runtime.