Nostalrius Begins - Quality wow vanilla realm (1.12)

After download and installing WoW from this guide http://forum.nostalrius.org/viewtopic.php?f=6&t=638 and starting the client it goes black screen instantly and alt tabs itself few seconds later and this keeps happening whenever I launch the client. Please help!

https://forum.nostalrius.org/viewtopic. ... 54#p102665

Additionally:
https://forum.nostalrius.org/search.php ... %5B0%5D=45