exported Version have errors?

My game is finished and I tested it in the editor and everything works. But if I export it and then start the exported version and play up to a certain point, it just hangs even though it worked in the editor. I once pressed F12 and what you see in the picture is displayed. Can someone do something with it and tell me what I have to do to fix it?

What export option are you using - HTML5? And how do you start the exported game?

error 404 is a file not found issue, which means not all the exported files got copied to the server. try uploading again.