This is definitely interesting! It seems that the engine can’t access many plugin resources whatsoever when trying to build. To add it’s also acting as though it’s having namespace issues as though there’s duplicated plugins. It’s possible it could be an issue with the VS solution itself, but I’ll have to do a bit more research there.
Are you running the engine and project files from the same Drive?
Let’s try a couple things. To prepare for this, please back your project up somewhere safe.
Delete the Intermediate, Saved, and DerivedDataCache folders from your project folder, then launch your project to regenerate them.
Then try and build to a fresh directory. Do you still receive the same plugin errors?