Riot Points

Grettings people of the internet my name is Drixfool and i would like some help from you guys in the LOL store (not in game) their is a bug, the bug is when you are trying to buy some Riot Points in the store it will just come a black screen with black text saying ''An Internal Error Has Occurred. Error: An Internal Error Has Occurred.'' if anyone would know how to fix this bug in any kind of why please tell me