Hi darkage,
Follow this link to clear your caches and make sure you clear both the Flash and Browser cache. Any time you get a loading error like that it usually means one of your cached files is corrupted or out of date. That's a common enough occurrence and clearing your caches should take care of the problem.
Once you've cleared both caches be sure to reset any in-game options you prefer, such as flagstick animations or the putting grid option before you tee off again.