Project keep crashing when loading at 83%

Hi Guys! Please help me!

I launch my project from the launcher, it crashes. When I launch the .uproject, it crashes.

I found “FAILED TO LOAD SPECIAL MATERIAL” in the log, but is show the rest of it:

[2017.02.16-14.29.22:807][ 0]LogMeshUtilities: Finished distance field build in 3.6s - 21x50x21 distance field, 916 triangles
[2017.02.16-14.29.22:807][ 0]LogMeshUtilities: Finished distance field build in 0.1s - 9x8x13 distance field, 200 triangles
[2017.02.16-14.29.22:807][ 0]LogMeshUtilities: Finished distance field build in 1.5s - 31x27x20 distance field, 1068 triangles
[2017.02.16-14.29.22:807][ 0]LogWindows:Error: === Critical error: ===
[2017.02.16-14.29.22:807][ 0]LogWindows:Error:
[2017.02.16-14.29.22:807][ 0]LogWindows:Error: Fatal error: [File:D:\Build++UE4+Release-4.15+Compile\Sync\Engine\Source\Runtime\Engine\Private\UnrealEngine.cpp] [Line: 1482]
[2017.02.16-14.29.22:807][ 0]LogWindows:Error: Failed to load special material ‘’
[2017.02.16-14.29.22:807][ 0]LogWindows:Error:
[2017.02.16-14.29.22:807][ 0]LogWindows:Error:
[2017.02.16-14.29.22:807][ 0]LogWindows:Error: KERNELBASE.dll!0x00000000D6808B9C
[2017.02.16-14.29.22:807][ 0]LogWindows:Error: UE4Editor-Core.dll!FOutputDeviceWindowsError::Serialize() [d:\build++ue4+release-4.15+compile\sync\engine\source\runtime\core\private\windows\windowsplatformoutputdevices.cpp:120]
[2017.02.16-14.29.22:807][ 0]LogWindows:Error: UE4Editor-Core.dll!FOutputDevice::Logf__VA() [d:\build++ue4+release-4.15+compile\sync\engine\source\runtime\core\private\misc\outputdevice.cpp:70]
[2017.02.16-14.29.22:807][ 0]LogWindows:Error: UE4Editor-Core.dll!FDebug::AssertFailed() [d:\build++ue4+release-4.15+compile\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:349]
[2017.02.16-14.29.22:807][ 0]LogWindows:Error: UE4Editor-Engine.dll!LoadSpecialMaterial() [d:\build++ue4+release-4.15+compile\sync\engine\source\runtime\engine\private\unrealengine.cpp:1482]
[2017.02.16-14.29.22:807][ 0]LogWindows:Error: UE4Editor-Engine.dll!UEngine::InitializeObjectReferences() [d:\build++ue4+release-4.15+compile\sync\engine\source\runtime\engine\private\unrealengine.cpp:1592]
[2017.02.16-14.29.22:807][ 0]LogWindows:Error: UE4Editor-UnrealEd.dll!UEditorEngine::InitializeObjectReferences() [d:\build++ue4+release-4.15+compile\sync\engine\source\editor\unrealed\private\editorengine.cpp:792]
[2017.02.16-14.29.22:807][ 0]LogWindows:Error: UE4Editor-Engine.dll!UEngine::Init() [d:\build++ue4+release-4.15+compile\sync\engine\source\runtime\engine\private\unrealengine.cpp:909]
[2017.02.16-14.29.22:807][ 0]LogWindows:Error: UE4Editor-UnrealEd.dll!UEditorEngine::InitEditor() [d:\build++ue4+release-4.15+compile\sync\engine\source\editor\unrealed\private\editorengine.cpp:557]
[2017.02.16-14.29.22:807][ 0]LogWindows:Error: UE4Editor-UnrealEd.dll!UEditorEngine::Init() [d:\build++ue4+release-4.15+compile\sync\engine\source\editor\unrealed\private\editorengine.cpp:846]
[2017.02.16-14.29.22:808][ 0]LogWindows:Error: UE4Editor-UnrealEd.dll!UUnrealEdEngine::Init() [d:\build++ue4+release-4.15+compile\sync\engine\source\editor\unrealed\private\unrealedengine.cpp:75]
[2017.02.16-14.29.22:808][ 0]LogWindows:Error: UE4Editor.exe!FEngineLoop::Init() [d:\build++ue4+release-4.15+compile\sync\engine\source\runtime\launch\private\launchengineloop.cpp:2513]
[2017.02.16-14.29.22:808][ 0]LogWindows:Error: UE4Editor-UnrealEd.dll!EditorInit() [d:\build++ue4+release-4.15+compile\sync\engine\source\editor\unrealed\private\unrealedglobals.cpp:76]
[2017.02.16-14.29.22:808][ 0]LogWindows:Error: UE4Editor.exe!GuardedMain() [d:\build++ue4+release-4.15+compile\sync\engine\source\runtime\launch\private\launch.cpp:150]
[2017.02.16-14.29.22:808][ 0]LogWindows:Error: UE4Editor.exe!GuardedMainWrapper() [d:\build++ue4+release-4.15+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:134]
[2017.02.16-14.29.22:808][ 0]LogWindows:Error: UE4Editor.exe!WinMain() [d:\build++ue4+release-4.15+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:210]
[2017.02.16-14.29.22:808][ 0]LogWindows:Error: UE4Editor.exe!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:264]
[2017.02.16-14.29.22:808][ 0]LogWindows:Error: KERNEL32.DLL!0x00000000D70513D2
[2017.02.16-14.29.22:808][ 0]LogWindows:Error: ntdll.dll!0x00000000D940EB64
[2017.02.16-14.29.22:808][ 0]LogWindows:Error: ntdll.dll!0x00000000D940EB64
[2017.02.16-14.29.22:808][ 0]LogWindows:Error:
[2017.02.16-14.29.22:833][ 0]LogExit: Executing StaticShutdownAfterError
[2017.02.16-14.29.22:836][ 0]LogWindows: FPlatformMisc::RequestExit(1)
[2017.02.16-14.29.22:836][ 0]Log file closed, 02/16/17 15:29:22

Thanks Guys!!!

If somebody got the same,
Solution in this report: Fatal crash: Loading project, "Failed to load special material" - Programming & Scripting - Epic Developer Community Forums