Everything works fine until I try to launch the game on the computer, then the editor crashes.
Please help.
This is the log:
Assertion failed: Mips.Num() > 0 [File:D:\Build++UE4+Release-4.14+Compile\Sync\Engine\Source\Runtime\Engine\Private\TextureDerivedData.cpp] [Line: 1233]
UE4Editor_Core!FDebug::AssertFailed() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:332]
UE4Editor_Engine!FTexturePlatformData::GetNumNonStreamingMips() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\engine\private\texturederiveddata.cpp:1238]
UE4Editor_Engine!SerializePlatformData() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\engine\private\texturederiveddata.cpp:1334]
UE4Editor_Engine!FTexturePlatformData::SerializeCooked() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\engine\private\texturederiveddata.cpp:1373]
UE4Editor_Engine!UTexture::SerializeCookedPlatformData() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\engine\private\texturederiveddata.cpp:1959]
UE4Editor_Engine!UTexture2D::Serialize() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\engine\private\texture2d.cpp:211]
UE4Editor_CoreUObject!FArchiveSaveTagExports::ProcessTaggedObjects() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\savepackage.cpp:994]
UE4Editor_CoreUObject!FPackageExportTagger::TagPackageExports() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\savepackage.cpp:3212]
UE4Editor_CoreUObject!UPackage::Save() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\savepackage.cpp:3784]
UE4Editor_UnrealEd!UEditorEngine::Save() [d:\build++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\editorengine.cpp:3966]
UE4Editor_UnrealEd!UCookOnTheFlyServer::SaveCookedPackage() [d:\build++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\cookontheflyserver.cpp:2962]
UE4Editor_UnrealEd!UCookOnTheFlyServer::TickCookOnTheSide() [d:\build++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\cookontheflyserver.cpp:2166]
UE4Editor_UnrealEd!UCookOnTheFlyServer::Tick() [d:\build++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\cookontheflyserver.cpp:770]
UE4Editor_UnrealEd!FTickableEditorObject::TickObjects() [d:\build++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\public\tickableeditorobject.h:17]
UE4Editor_UnrealEd!UEditorEngine::Tick() [d:\build++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\editorengine.cpp:1195]
UE4Editor_UnrealEd!UUnrealEdEngine::Tick() [d:\build++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\unrealedengine.cpp:371]
UE4Editor!FEngineLoop::Tick() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\launch\private\launchengineloop.cpp:2859]
UE4Editor!GuardedMain() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\launch\private\launch.cpp:152]
UE4Editor!GuardedMainWrapper() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:202]
UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:264]
kernel32
ntdll