Can't open some modpacks

[Omega_Volta]

I was planning on using some mods, but when I opened the modpack I intended to use, it just shut down and sent me back to the launcher screen. 

I've tried removing the mods, uninstalling and reinstalling the modpack, updating my launcher, updating java, and restarting my computer, to no avail.

Down below is the log in pastebin:

https://pastebin.com/y64AeY0t