Solved TypeLoadException: Could not load type 'GameManager'

I never did an update in my server before so, I think I broke something.
I was in Steam CMD and I did a command: app_update 405100 validate
and I think it install the newest update.
Than, I put the new oxide plugins in the folder, replacing all.
After that, my server should be online but it's not.
I checked the gamelog file and this is what I get:

Code:

TypeLoadException: Could not load type 'GameManager' from assembly 'Assembly-CSharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null'.
  at LoadBalancer.Update () [0x00000] in <filename unknown>:0
(Filename:  Line: -1)

 

I am sure! Should I make the server again, put the same plugins and move just the savegame?

 

I did this before and wasn't working. I did it now and it's working.
WTF?

Thanks, wulf <3