It’s not that the plugin hasn’t been compiled into the binary release of the engine, it’s that it hasn’t been compiled with Lua enabled. Without Lua enabled the code generator plugin will still generate sample glue code that you can find under Engine/Intermediate/Build/Win64/Inc/Plugins/ScriptPlugin, this also addresses an earlier question about what is currently being exposed to Lua, there’s a generated .script.h in that directory for every class that’s exported.