[CLIENT] Upgrading to Level 7 Mastery on Caitlyn and nothing happened

I finally gained 2 Caitlyn tokens to upgrade my level 6 Caitlyn to a Level 7 mastery. I had the required blue essence and 2 tokens to upgrade her, and when I did, nothing happened and I am still level 6 mastery. My tokens and blue essence were consumed as well. Can you help me and at least look at my hextech crafting history. Thanks.