While attempting to add a source-code plugin to my source-code build of UE4, I somehow messed it up and it won’t launch. So I’m doing a clean rebuild. I deleted the Saved and Intermediate folders, marked all the files so they’re not Read-only (in both the engine folder and my project), tried what G…

I would delete all of it, reclone the repository, run setup.bat and generate the visual studio files again. Get it running from a clean-rebuild before making changes.