Just curious. Bad English sorry :/
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When I enter the website, I receive this. 
Until I use vpn, and it work. Does my ip are forbidden?
When I login CodeForces, and click API page, it reply: 
Either use firefox or chrome, it reply same thing. And I remove my CodeForces API, it still reply same thing.
Edit. When I logout, it can shown, but cant shown while you logging in.
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