Issues durring new champ select regarding masteries.

Hello!

I have been experiencing this issue ever since the new champ select for ranked games has been released. Basically, any time I would try to

1. edit any existing mastery page during champ select.
2. Create a new mastery page during champ select.
3. Any time I try to change my mastery page during champ select.

I get "unexpected error occurred" This results in me having the same keystone/mastery selection every game since it isnt loading a new config If anyone has a fix or possibly a way of avoiding the issue please let me know as it is very frustrating.

Thanks, Lebulba