Create/Update Comments: n.json is undefined


I get this message when I validate the code in mflix.
I’m not passing ‘can update a comment’, I am passing the other two tests and all the previous ones.
What is n.json?

I have read through most posts and I am pretty sure that my code is correct:
{ “_id”: ObjectId(commentId), “email” : userEmail },
{ “$set”: { “text”: text, “date” : date } }

Thank you and greets,