Server starts when oxide isn't installed but with oxide it says "MissingFieldException: Field 'ProtoBuf.Environment.engineTime' not found." in the end of a start up and the server doesn't do anything after that, I can put commands in the console and it registers them but i cannot join the server

That means you are mixing Rust versions. Oxide is patched for specific versions of the games, with only the latest released version of the game being supported. If you are trying to use a branch other than the public release one, that will not work and is unsupported.

After updating the server again it works perfectly fine. I didn't expect it to be that since it worked fine without oxide.