Not Launching

[QuesadilaBob]

I wanted to play a modpack that looked cool and when i installed it  i tried to play it only for the launcher to disappear and reappear and not doing anything AT ALL. please help.

[Torezu]

Logs?  Java version is important - if you're using 9, it's not going to work.  If your graphics drivers are outdated, it's not going to work.