It appears that you replaced the Strive game scripts with the files in "AricsExpansion/scripts", which erased a variable that exists in the vanilla game. You should only copy the contents of "AricsExpansion/IMPORTANT - READ THIS BEFORE INSTALLING/Put in Strive Game Files" into your Strive game folder. You will need to start the installation over with a fresh Strive folder, since yours has been corrupted.