Client error when connecting to modded server

When trying to connect to a server with no plugins loaded, just Oxide, My client gets an error when logging into the server.



If Oxide isn't loaded, I can connect fine.

I can confirm:

Through steamcmd, the server is updated

Using the latest UMod version (downloaded today)

Server is Ubuntu 18.04.4 LTS

Anyone know why this might be?

Did you download oxide for Linux?
Are you using a branch other than the public one, such as staging? The error doesn't appear to be from Oxide, so it would either be mixed Rust files or a plugin.
Release branch is standard on the server side, and the client is opted out of all beta programs.
Happy to fully reinstall everything and see if that cures it