Why do i have 0 Mastery Points?

I was afk for a few hours and when i returned i ate dinner and then went to play league. my friend asked me how many points i have on , and i went into collection to see that my mastery points was gone. When i checked profile, it wasnt bugged out and showed my mastery points on vi, xin and aatrox. I restarted the client but the bug is still there. Can some one help me pls? Thx <3