Server constantly crashes/ cannot start

I'm playing on a Curse Enigmatica 2: Expert modpack and a lot of times when i try to start the server it just crashes. Yesterday

it started after a second try, but today i've been trying for hours and it's just not working. I had this problem for a long time now, i don't know why it's happening.

Here's a link to the server log: https://mclo.gs/nJjJkjB

Yes, i've tried many other modpacks and it's always the same. I've reinstalled the server many times, but nothing helped. The worst part is that it's not only my problem, my friend also has this problem and it's so frequent that sometimes we just can't play. Firstly i thought that it might be the modpack's fault, but it kept on going even if we changed the software.