i think you forgot to include the pck file in your build. When you build a game with an engine like godot or unity it comes with the executable you play, but then it also comes with other files and dependencies, such as crash handlers and dlls. Make sure when you submit the files for your game you also include those files. What you can do is create a zip file of all the folders and files that came with the build of your game, and then upload that, the exe alone is not enough to play the game. Good luck!!