Hi Warlock,
Unexpected game errors are usually a result of outdated or corrupted cache files. Game files are stored in your caches and those caches need to be cleared every time we introduce a product update. Follow this link to learn how to clear both of your caches and keep it handy because you'll need to do this every time we make a change to the game (product update).
After you clear your caches, restart your browser and be sure to reset any in-game options you prefer such as Flagstick Animations or over Graphics Quality before you tee off again.