1.7.10 Pack Server Won't Launch

Hi! I have a server with a few friends that means a lot to us, we've spent a lot of hours on it. The mod we have installed is the 1.7.10 pack. When we go to start up the server, it says "starting" for awhile, but before it ever turns on, it shows that it crashed, with the broken heart symbol. was wondering if there's anything we can do to fix this. Here's the log. https://mclo.gs/PuIj8yh