When creating a blank slate project and importing “standard assets for unity64” I continuously get errors like “prefab has multiple transform components: removing them automatically is not safe” and errors about obsolete scripts.
Try closing and reopening your project. You should get something like"This project uses obsolete APIs. Unity will automatically upgrade ant obsolete APIs if you choose to continue. It is strongly recommended that you make a backup before continuing."
Obviously that’s not word for word, but clicking continue should update the assets, including scripts with outdated keywords. If that doesn’t pop up, do what @moxiewhimsy suggested and manually update them. If that doesn’t work, I don’t know.