Cannot buy addiontal rune pages with bluepoints bug has been happening for over 6 months now.

​1. Login to client 2. Click on store 3. Click on Accessories 4. Click 'Rune Pages'. 5. Click on 'Additional Rune Page'. A. Click option to use Blue Points for 6300 instead of ingame money. Expected result: Should end where it uses my BluePoints and Allows me to buy a new rune page.

Actual Rule: A error occurs and doesn't allow me to purchase a runepage with BluePoints for 6300. This bug has been working against me for the past 6 months. I would like to spend my blue points please.

I'm not the best at the game but this is limiting the number of champs I could play, I have a hard time with the game still including knowing all the best runes for each champ I play. This has been limiting my pool for awhile now and would really appreciate this bug to be fixed or my account to be looked into as of why I been getting a error over the past 6 months. I would really like to gain an extra rune pages and open up my pool a little more. Thank you for reading and have a great day guys.