Not an Issue Server out-of-date after installing Oxide (old build)

Your server isn't updated fully. Make sure you aren't installing an old Oxide build, as it will contain the patched Rust DLLs for that specific version.

 

You'd be installing an older Oxide build then. Make sure you're downloading the latest build and that your server is set to the release branch of Rust.

Oxide is a mod, so it includes patched files from the version of the game it supports. If you install an older build, you'd be downgrading some of the game. As of the last Rust update yesterday, Oxide is updated for it.

 

Check the oxide.version command after starting it. If it doesn't match the version for Oxide.Rust shown here: Release build changelog then you've somehow gotten and older build. I'd suggest re-downloading and making sure to replace ALL files when installing Oxide.