how did you extract the files? that file is included with the game download but the executable isn't able to find it, so maybe you saved the files to a different directory? the RSC folder should be in the same folder as the game executable and everything else.
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I extracted the contents of the download directly to their own folder. That folder now contains a folder titled "gaaaaaaame", with contains the RSC folder, executable and a bunch of other files. I am attempting to run the game by double-clicking on the executable. Just now I deleted the folder, downloaded/extracted it again and had the same result.