Trying to add the MoveForward script to the Player Car and the first message I get is: “Can’t add script…all scripts need to successfully compile first!”
I tried shutting down and restarting as was suggested elsewhere, but this didn’t do the trick.
In your status line - the one at the bottom of the screen - It will show syntax errors in your scripts. Double click on it and it will bring you to the line in the script causing the trouble. Then you need to fix the script.
Selecting Assets Rebuild corrected the problem.