Error(s) in re-building vignettes:
--- re-building 'hockey-ref-scrapers.Rmd' using rmarkdown
Quitting from lines 35-38 (hockey-ref-scrapers.Rmd) 
Error: processing vignette 'hockey-ref-scrapers.Rmd' failed with diagnostics:
no applicable method for 'xml_find_first' applied to an object of class "NULL"
--- failed re-building 'hockey-ref-scrapers.Rmd'

--- re-building 'hockeyR.Rmd' using rmarkdown
--- finished re-building 'hockeyR.Rmd'

SUMMARY: processing the following file failed:
  'hockey-ref-scrapers.Rmd'

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
--- re-building 'hockey-ref-scrapers.Rmd' using rmarkdown
Quitting from lines 35-38 (hockey-ref-scrapers.Rmd) 
Error: processing vignette 'hockey-ref-scrapers.Rmd' failed with diagnostics:
no applicable method for 'xml_find_first' applied to an object of class "NULL"
--- failed re-building 'hockey-ref-scrapers.Rmd'

--- re-building 'hockeyR.Rmd' using rmarkdown
--- finished re-building 'hockeyR.Rmd'

SUMMARY: processing the following file failed:
  'hockey-ref-scrapers.Rmd'

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
--- re-building 'hockey-ref-scrapers.Rmd' using rmarkdown
Quitting from lines 35-38 (hockey-ref-scrapers.Rmd) 
Error: processing vignette 'hockey-ref-scrapers.Rmd' failed with diagnostics:
no applicable method for 'xml_find_first' applied to an object of class "NULL"
--- failed re-building 'hockey-ref-scrapers.Rmd'

--- re-building 'hockeyR.Rmd' using rmarkdown
--- finished re-building 'hockeyR.Rmd'

SUMMARY: processing the following file failed:
  'hockey-ref-scrapers.Rmd'

Error: Vignette re-building failed.
Execution halted