Error in Downloading and Knit

I tried to save and knit a handout I had to complete but every time I try to go and save or knit I get :
line 36 Error in eval(express, environment, enclosed) : object 'Arbuthno' not found
Calls: ... handle -> withCallingHandlers -> withVisible -> eval -> eval
Execution halted

isn't present in the namespace in which the code in line 36 is attempting to operate. It could be as simple as a mis-spelling: Should it be Arbuthnot (with a final t) or more involved? To help community members find the actual problem, more information is needed. See the FAQ: How to do a minimal reproducible example reprex for beginners.

Sorry, yes it is supposed to be spelled Arbuthnot and I did spell it that way too.

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