Error(s) in re-building vignettes:
--- re-building 'introducing-educationdata.Rmd' using rmarkdown

Fetching data for college-university/ipeds/student-faculty-ratio/2009/? ...
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Fetching data for college-university/ipeds/student-faculty-ratio/2012/? ...
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Fetching data for college-university/ipeds/student-faculty-ratio/2013/? ...
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Fetching data for college-university/ipeds/student-faculty-ratio/2014/? ...
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Fetching data for college-university/ipeds/student-faculty-ratio/2015/? ...
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Fetching data for college-university/ipeds/student-faculty-ratio/2016/? ...
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Fetching data for college-university/ipeds/student-faculty-ratio/2018/? ...
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Fetching data for schools/ccd/enrollment/2008/grade-9/race/sex/?ncessch=340606000122 ...

Fetching data for schools/ccd/enrollment/2008/grade-10/race/sex/?ncessch=340606000122 ...

Fetching data for schools/ccd/enrollment/2008/grade-11/race/sex/?ncessch=340606000122 ...

Fetching data for schools/ccd/enrollment/2008/grade-12/race/sex/?ncessch=340606000122 ...
pandoc.exe: CreateTimerQueueTimer
Error: processing vignette 'introducing-educationdata.Rmd' failed with diagnostics:
pandoc document conversion failed with error 1
--- failed re-building 'introducing-educationdata.Rmd'

SUMMARY: processing the following file failed:
  'introducing-educationdata.Rmd'

Error: Vignette re-building failed.
Execution halted