Hello, please refrain from using other people's threads, as it could be for different issues. For the few of you that did use the original writer's thread, black screen issues can be caused by numerous issues, many of which are fixed by clearing cache, flushing DNS, and reinstalling the new miniclient. If these do not fix it, you should try using an older version of the miniclient, to see if that allows you to login, or using a VPN, as this will allow you to bypass any servers that might be down between yours and the games.