Cannot use my masteries in game, keep getting error since this morning

Hello,

I keep getting this message everytime i click on my masteries, or try to save a new page.

Error

An unexpected error has occurred

Sorry about that. We've sent a report to the server.

If you continue encountering this errour you may want to check the support site or forum for more information.

Even if it looks like my masteries are selected, once it game the masteries are all at zero.

I've tried restarted league a couple of times, and the issue persists.

Any thoughts anyone?

Thanks,