Greasy Fork is available in English.
More layouts and customization options for V3
This seems to happen on some languages (though weirdly not all). This hasn't been looked into yet. For now you'll have to use English, or try to find another language that works. (One particularly weird instance is that Español (España) does not work while Español (Latinoamérica) and Español (US) do, saying this just in case you happen to be using Spanish as your language)
Channel page on Aozora, Cosmic Panda, Epic Panda & Early 2013. The video's section on channel pages on said layouts, just keep loading infinitly.