On the curse forge page it says that the 2.0 release works on 1.16.5 but when I installed it and started my server it said that it will exclude the mod and that it is not in a file called mods.toml or something along those lines... What should I do, is there a library that I should download?

I updated but the server crashes. But I might have found the issues, I was running a forge sever instead of a bukkit one, if you are sure that that might be the problem tell me!

Yes, it's a plugin that works with bukkit, spigot...

Thank you, I will install mohist on my server instead of forge!

Mohist is a mixed server types, so you can use both bukkit and forge.

For the people who had the same issue try installing mohist.

The latest version 2.3 also supports this version of Minecraft. Please update to the latest version then let me know if there is still the same problem with this one.