Fatal error: [File:D:\Build++UE4+Release-4.15+Compile\Sync\Engine\Source\Runtime\Engine\Private\GlobalShader.cpp] [Line: 353]
Missing global shader FPixelShaderDeclaration, Please make sure cooking was successful.
What happens when you just cook the game, File → cook content for windows,
This should just cook instead of package and shows you all the warnings/errors that need to be addressed. I keep the value at 0 warnings throughout my game making process and address them quickly before adding more content.
Okay, first things first, back up your project folder, do this regularly so that if anything corrupts you have a backup. after that remove only the “saved” and “Intermediate” folder inside your project folder and reload the game. These folders are remade and initialized again. try packaging your game again and running.
in your place i would try to clone this project into sepperate dir and delete all the levels, then creating a default awful level without any lighting and meshes, cooking and looking if the error occurs.
it would narrow the causes lookup