Anytime we want to choose a cryptocurrency exchange to trade on, I will advise you to make a very deep research on that particular exchange in order to fall into a scam. Many exchange platforms this days are all dead exchanges and many people tends to use their image to scam many people of their funds and that is why I repeat my emphases that you should try to make research, not just research but deep researches so that you will be able to distinguish between scam exchanges and legit ones.
However, this exchange, Yuppex is what I am talking about on this review of mine. I do not really know about what happened to this exchange, Yuppex, but it seems like its connection, URL, might have been broken and that is the main reason for its website not been reachable. Also this exchange seems to still be a very new exchange but happens to be offline. In conclusion, please stay away from it.