The 'watch a game and get a reward' quests never work for me

I literally just went outside for like 3 hours and left the MSI live games on play and when I got back I still didn't get a reward. I logged into the website with my account so there's no reason why I shouldn't get the reward, and if there is, why isn't riot more clear on how to complete these quests? It's a bit ridiculous if you ask me, but I'm not really mad about it because it only gives 150 BE and I had to go outside anyways. I have never been able to complete these kinds of quests, kind of annoying.
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