"Failed to synchronize registry data from server"

I've been trying to create a lightly modded server for me and my friends to play. The server launches normally, but if I try joining, it says: "Failed to Synchronize registry data from the server, closing connection".

Server software:

Forge

Forge version:

36.1.0

Minecraft version:

1.16.5

The log: https://mclo.gs/PXGByMT

Quote from Roman

You probably don't have the same mod collection on your client as on the server?

No, I checked several times but the mods are the same.

Quote from Roman

Share your client log.

It's located in .minecraft/logs/latest.log

Here

Quote from Roman

Which version of Comfortable Nether is installed on your computer?

Comfortable Nether version: 4.9