I did

  title = {Foundations for Category Theory},
  author = {Daniel Murfet}
  note  =  {\url{http://therisingsea.org/notes/FoundationsForCategoryTheory.pdf}},
  note = {Accessed: 5-3-2019}

and loaded hyperref in my LaTeX file. It gives this


error. I copied the code from here: How can I use BibTeX to cite a web page? so I don't think there are any typos.


Because you gave no complete minimal working example with bibliography (MWEB) I can not test my corrections for you. Please do it yourself and report the result.

You should add the missing comma after author and you should change http:// to https:// in your used url:

  title = {Foundations for Category Theory},
  author = {Daniel Murfet},
  note  =  {\url{https://therisingsea.org/notes/FoundationsForCategoryTheory.pdf}},
  note = {Accessed: 5-3-2019},

The missing comma results in the error message you got.

  • Ugh, facepalm. The comma fixed it, thank you. – user388557 Apr 16 at 15:40

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