Stop pretending to be good at English, @lastAnswerPublisher!!! You are actually speaking Chinglish!!! You can't speak English at all!
By the way, your suggestions are nice. It's acceptable. But the best solution is to contact the webmaster.
I've also encountered this. You can download offline document. @Zdhxiong's GitHub has the MDUI document and the Material Design Document both.
As for the community, I don't have any ideas, either. But the error is always temporary, you can access the community soon.