Custom modpack crashes immediately when I try to launch it

[hipops]

 

I just uploaded a custom modpack for me and some friends to play on through the technic launcher. The only issue is that when I try and launch it, it immediately closes the launcher and opens it again, as if it were immediately crashing. It works perfectly fine when I use the mods in my personal mods folder and not through the technic launcher. This also only happens when using my specific modpack. Anybody able to help with this?