Some errors can be coding.. but a majority of the time, lots of these QSP games used lots of images and if you only download the "updates" and never the usually gigs huge original/main file with all the images, you miss out. That plus people do really weird things with their folder structures, and dont just leave things simple. Dont use a protected place (no desktop, no program files, no root of C drive) and just have your games buired in some folder, extract it, have the .qsp file with then folders for where the images should be and that part should be fine.
As specifically FOR THIS GAME - it relies on a variant of the "normal" QSP player.. if you have the wrong one, doesnt matter what you do, you will get errors. If you get the one listed in the OP - you will be fine, then its a matter of not using basic file associations for double click activation, but instead RUN the specific player, OPEN GAME in the Player.
As for the rest.. Yes. .most are Russian, But Girl Life & this game, are probably the main 2 made by non-russian devs and have learned their ways around the engine for the most part.