Same problem here with the gallery mod. And I´m definitely not too stupid to install it correctly.
This time there must be something different because I have the same problem and I have done everything correctly, exactly as I did on the other occasions. This time I am getting an error as well.
Default Windows extractor can't extract the files correctly, try using 7zip or WinRAR (worked for me)I got problem, when file named chapter0_replays.rpy cant be extracted. Gets error every time