Everything is perfectly normal while opening the launcher, but as soon as I get onto the page, its comes up with: 

 Whoops!

Sorry, something went terribly wrong and you've probably encountered a bug. Please file a report here.

I don't know whats happening but I've tried to restart the launcher and it just doesn't work, which means i cant play. I don't know if its my computer or not but if it isn't please fix it!