Unless our content servers are down, which we have many of them all over the world and they have not been down, you should not have an asset loading problem.
If your internet connect is strong and you are not having firewall issues, then the main issue is a corrupt asset that is cached in your browser. If you try another browser it should solve the issue. If you do not want to change browsers, clearing your browser cache is usually not enough. You will have to clear your flash cache (google that) or reinstall the flash player with essentially does the same thing. Good luck and have fun. I hope that helps.