So I wanted Sponge for my SkyFactory 3 server so I can get plugins and so on…
But when I try to start the server it constantly crashes in the starting phase.
Here’s the crash log
Update Java to at least Java 8 Update 40, for more info check out our docs, stuff like that is specifically mentioned in the Installation guide.
How will I update java on a multicraft server?
Contact them about it, they are a private company, and Sponge is not affiliated with them.