Like I said, I removed all other plugins except oxide and Rust:io, to me the error is suggesting it is not linking to an instance of the object, but I have no coding knowledge, I can only see what it says, I do have experience of running servers and setting up plugins though so doubt its some sort of noob thing on my behalf, I have reached out to the other members on the support channel who have been experiencing the same issue, from what i have been told they abandoned the plugin as they could not resolve it either.
Ellis