Hi,
it's a problem caused by your browser and the javascripts used for the menus in the top of the forums. First of, I need to know
1 - Which browser and version are you using?
2 - Once the page has
fully loaded, and you click on the "Arcade" button, do you see the menu or not?
If you can give me this info, I should be able to help. Meanwhile, just go to
https://arcade.psfantasy.com for the arcade or
https://forums.psfantasy.com/ushop.php for the shop.