I'm having some technical difficulties setting up a forge 1.20.1 server, and I believe it has to do with either moonlight or supplementries. It is this issue that I'm having: https://forums.minecraftforge.net/topic/121554-failed-to-get-registry-access-this-is-a-bug/ Are you aware of this issue or how to fix it, or is it another mod causing the issue? It seems when I play with the same mods on singleplayer it is okay, and the server loads okay, but when i try to join, I get this error.

latest (1).log

+1
It look as if it's related to Supplementaries, because the first time anyone tries joining the server, they get a different message:

sometimes this mentions concrete_dusts instead of hourglass_dusts
The following attempts to join all trigger OP's message. Also, seems to be related or the same as #175

In our case, we can confirm that both the server and the client have the same versions of Supplementaries (1.20-2.8.15) and Moonlight (1.20-2.12.1).
In case it helps, mod list -> modlist.txt

UPD: prompted by this, I tried updating Moonlight and Supplementaries to their latest versions and the issue went away, @Lincolnium I suggest you also try it.

You need to make sure the version of Moonlight lib is same as the server's version of Moonlight Lib.
beside that, the latest version for Moonlight lib is v2.12.6.

I need the client latest.log. Also from your server log i dont see any connection made to that server, like you booted it up and didnt try to connect to it