Material is NULL when using Windows x64 packaged game

[7Hazard]

It all works completely fine in editor, however in a Windows x64 packaged game

Assertion failed: Texture [File:G:\Work\UE4\Projects\EscapeFromGorilla\Plugins\BLUI\Source\Blu\Private\BluEye.cpp] [Line: 512]
There is no texture to return! Did you forget to call init?

KERNELBASE.dll!0x00000000D0ED3C58
EscapeFromGorilla.exe!FOutputDeviceWindowsError::Serialize()
EscapeFromGorilla.exe!FOutputDevice::Logf__VA()
EscapeFromGorilla.exe!FDebug::AssertFailed()
EscapeFromGorilla.exe!UBluEye::GetTexture() [g:\work\ue4\projects\escapefromgorilla\plugins\blui\source\blu\private\blueye.cpp:513]
EscapeFromGorilla.exe!UBluEye::execGetTexture()
EscapeFromGorilla.exe!UFunction::Invoke()
EscapeFromGorilla.exe!UObject::CallFunction()
EscapeFromGorilla.exe!UObject::ProcessContextOpcode()
EscapeFromGorilla.exe!UObject::execLetObj()
EscapeFromGorilla.exe!UObject::ProcessInternal()
EscapeFromGorilla.exe!UObject::CallFunction()
EscapeFromGorilla.exe!UObject::ProcessInternal()
EscapeFromGorilla.exe!UFunction::Invoke()
EscapeFromGorilla.exe!UObject::ProcessEvent()
EscapeFromGorilla.exe!UUserWidget::Construct()
EscapeFromGorilla.exe!UWidget::TakeWidget_Private()
EscapeFromGorilla.exe!UUserWidget::AddToScreen()
EscapeFromGorilla.exe!UUserWidget::execAddToViewport()
EscapeFromGorilla.exe!UFunction::Invoke()
EscapeFromGorilla.exe!UObject::CallFunction()
EscapeFromGorilla.exe!UObject::ProcessContextOpcode()
EscapeFromGorilla.exe!UObject::ProcessInternal()
EscapeFromGorilla.exe!UObject::CallFunction()
EscapeFromGorilla.exe!UObject::ProcessInternal()
EscapeFromGorilla.exe!UFunction::Invoke()
EscapeFromGorilla.exe!UObject::ProcessEvent()
EscapeFromGorilla.exe!AActor::ProcessEvent()
EscapeFromGorilla.exe!AActor::ReceiveBeginPlay()
EscapeFromGorilla.exe!AActor::BeginPlay()
EscapeFromGorilla.exe!ACharacter::BeginPlay()
EscapeFromGorilla.exe!AActor::DispatchBeginPlay()
EscapeFromGorilla.exe!AWorldSettings::NotifyBeginPlay()
EscapeFromGorilla.exe!AGameMode::HandleMatchHasStarted()
EscapeFromGorilla.exe!AGameMode::SetMatchState()
EscapeFromGorilla.exe!UWorld::BeginPlay()
EscapeFromGorilla.exe!UEngine::LoadMap()
EscapeFromGorilla.exe!UEngine::Browse()
EscapeFromGorilla.exe!UGameInstance::StartGameInstance()
EscapeFromGorilla.exe!FEngineLoop::Init()
EscapeFromGorilla.exe!GuardedMain()
EscapeFromGorilla.exe!GuardedMainWrapper()
EscapeFromGorilla.exe!WinMain()
EscapeFromGorilla.exe!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:255]
KERNEL32.DLL!0x00000000D2368364
ntdll.dll!0x00000000D3F07091
ntdll.dll!0x00000000D3F07091