Server Error - Can't join server

Here is my log

I'm getting the following error when I hover over the server "Server has additional mods that may be needed on the client".

When I try to join the server I get the error "Failed to synchronize registry data from server, closing connection"

The server is also stopping shortly after starting. I'm guessing it's because of this error, but not sure if it's a different issue.

This is a list of the mods I have downloaded right now. I can't find anything that makes it not work

Forge 1.16.5-9.1.2 (36.2.34)

Minecraft version 1.16.5

byg 1.3.5

Explorer's Compass 1.16.5 - 1.1.2

journeymap 1.16.5 - 5.8.5p2

NaturesCompass 1.16.5 - 1.9.1

Pixelmon 1.16.5-9.1.2

I thought maybe if I removed Nature'sCompass that would fix it since it says 1.9.1 but that didn't work either. I'm including screenshots of my client as well.

Here they are

How do I do that?

I found it downloaded and put it in my mods folder and still not working.

Nevermind just going to pay for a server and do it all myself

I spent the ENTIRE day trying to get this to set up properly and nothing was working. So yeah $5 for a server that probably won't last more than a few weeks anyway, that took me 30-45 minutes to set up is definitely worth it.