Package check result: NOTE

Check: CRAN incoming feasibility, Result: NOTE
  Maintainer: ‘Thomas J. Matthews <txm676@gmail.com>’
  
  Found the following (possibly) invalid URLs:
    URL: https://sites.warnercnr.colostate.edu/anderson/wp-content/uploads/sites/26/2016/11/AIC-Myths-and-Misunderstandings.pdf
      From: inst/doc/sars-r-package.html
      Status: 500
      Message: Internal Server Error