can't link facebook to league

I decided to link Facebook to League, but [this](https://imgur.com/Jl1AD06) pops up. What permissions do I actually have to grant?
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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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