I have been having problems with the store for a while now, and I remember a couple weeks ago Riot said there was a problem with the NA store and they were looking into it. As of now, the status says the store is online, but I am still unable to make any purchases. I tried the troubleshooting to no avail (syncing clock, updating IE, etc.). I really want to purchase RP so I can buy some skins, but I cant!
Try reloading the store over and over, it works for me. Go to store, it stays black, click home then store again, it may say session has expired but then will actually load. The same goes for the categories once you are in the store. Click one, stays black, click a different, it loads, click the one you actually want again it may load. Same for purchases. Look at your ip/rp before you try to purchase something. If it works great, if it cliches then you can start over but make sure you werent charged for something you didn't receive. It took 2 tries for me to buy a rune page.
