I did not edit anything and my server stopped working. I reinstalled the rust server using SteamCMD, downloaded the last oxide release (not the one in development) and the rust:io dll and tested. It was working. After that, I added my plugins (only the plugins to see if it was a config file that was broken) and I still get the same errors! I really don't know what to do and would appreciate some help.
First, the server loads everything with no errors and seems to be ok but after a few seconds, these errors appear. 
These are the errors: https://pastebin.com/iXT4un2X

Everything started when I tried to wipe the map, after deleting the map files I started getting these errors, then I, as I said, reinstalled everything but with no success...

Update: Tried removing DeathNotes and the big red errors disappeared but I still get other errors that I did not have before, like "[InstantCraft] Failed to load approved workshop skins... Error 0"

Pretty much all of those errors indicate that your server is having issues connecting to the internet. Fix that, and they should all be fine.

UPDATE: OMG I F**KING HATE HAMACHI. I HAD SO MUCH PAIN TRYING TO FIGURE THIS OUT! If you have this crap software in your machine, it will totally break your server! If you don't want to uninstall it, search for services.msc, find the Log Me..., right click and stop it. Boom! All your problems are gone! 

I'm gonna cry aaaaa this really gave me a headache

Merged post

Yeah, these issues were Hamachi fault. Oh men, I really hate this dam program, it's not the first time it gives me problems with Rust servers... The best part is that Windows is not recognizing it so I can't quickly and easily uninstall it :/