Exception caught during firing event: Unknown entity class noobanidus.mods.lootr.entity.LootrChestMinecartEntity

crashlog:
crash-2021-02-25_21.05.25-server.txt

Mohist is a bridge between forge and spigot/paper

Unfortunately, due to the complexity of Spigot/Paper/Bukkit/etc as well as any bridge services, there's no way for me to provide you with any assistance, especially as this just appears to be the existed of my custom Minecraft entity.

You'll probably need to file an issue on the Mohist project or one of the other relevant projects to get someone who actually even understands what the issue is.

Sorry I can't help!

All good. Thank you for looking into this!
I reported it to mohist, hopefully they fix.

Good luck! I wish I could do more to help.