Bad gateaway error 502

I got a screen with bad gateaway error 502 and can't fix it. I restart lol many times and the game is still running. the half of my screen are with this message and can't fix it. There is any resolution?

We're testing a new feature that gives the option to view discussion comments in chronological order. Some testers have pointed out situations in which they feel a linear view could be helpful, so we'd like see how you guys make use of it.

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