FileNotFoundException: Could not load file or assembly 'System.Runtime.Serialization, Version=*.*.*.*, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies.

Any help would be appreciated

Never mind found the issue !

Be sure to mention what os (incase error is os specific), and the fix you used incase anyone else runs into a similar issue.

I am having the same issue, what was your fix? or the problem? 

Reinstalled Oxide