Mac client clash in champion select with beep sound.

My english is poor, but please help me riot.

LoL client clash in champion select with beep sound. So I have to quit the client, and get penalty...

https://youtu.be/Nx2oKbvsZig

Suddenly appear this bug. I don't know why My client is broken.

I tried PRAM clear and repair game files(https://support.riotgames.com/hc/en-us/articles/202969434-Patching-Issues#section-mac). But, still broken client.

please help me riot. I want to play League.

Thanks.