There seems to be something wrong with the network, try to restart the container again.
Have you PiHole installed in your network?
Recently I also have some porblems with my internet connection (some sites won't open, long loading times,...), I also get some questions here why some things are not downloading but I think this has something to do with a backbone and the "Internet" itself...
Try to restart the container again and look if it downloads the game in the logs.
Can you tell me whats in the two folders for the game in your appdata directory.
@Cyd sadly no, been really busy with my life at the time...