Minecraft Modpack own server crashes after a few minutes?

With the Minecraft modpack "Link" (YouTuber project), the Downloadable server crashes a couple of minutes after the start. We can play on the server shortly, and so after 5 minutes he crashes. Have assigned 12GB of RAM, so it can't be.

Here is the crash report:

The mod mocreatures caused the crash.

Why exactly can the developer tell you.

Try an earlier version or leave it altogether.

Props that you have provided directly your crash log and also via Pastebin.

Thanks for the quick help!

A turkey (turkey) at the position
X: -337.50
Y: 71.00
Z: -247.50

Tries to move at a speed of less than 0 (-0.08).

Could it be another Mod influenced the turkey?

Thumbs up for the log, we usually have to ask "MC Supporter" here first.

Thank you for your help!