Unknown Error

So I just got 1700 IP and was ready to buy a Mystery Champion Shard then it told me ''Unknown Item'' so I logged off and I got off and logged back on and tried to open Hextech Crafting and it told me ''An Unknown Error has occurred'' and once I clicked off the message, the screen was black and it said ''Loading Failed, please try again later''. I logged on my other accounts and same thing happened. An hour ago, Hextech Crafting was fine but now I can't buy anything related or open the shop. Is it supposed to be down or no? I just wanted to upgrade to Lv6 ..