Modpacks Don't Launch.

[DotBay]

So, when starting a modpack, it loads, and then the Technic launcher closes. It then reopens, no modpack. On top of that, it doesn't give me a crash report for it. Fixes?

[JaariAtmc]

But it gives you a log which you can find under Launcher Options -> Open Logs. Use pastebin or ubuntu pastebin.