@CTxCB, It seems to me you have done everything right, but the missing of ‘GeneratedScriptLibraries.inl’ indicated that the “ScriptGeneratorPlugin” is not actually running.
Can you double check that Lua.lib is in correct folder?
Engine\Plugins\ScriptPlugin\Source\Lua\Lib\Win64\Release\Lua.lib
And tried to rebuild UnrealHeaderTool project, then build engine again, you should be able to find ‘GeneratedScriptLibraries.inl’ in:
Engine\Plugins\ScriptPlugin\Intermediate\Build\Win64\UE4Editor\Inc\ScriptPlugin\GeneratedScriptLibraries.inl