Error(s) in re-building vignettes:
--- re-building 'learningtower_school.Rmd' using rmarkdown
trying URL 'https://github.com/kevinwang09/learningtower/raw/master/student_full_data/student_2018.rds'

Quitting from learningtower_school.Rmd:87-114 [unnamed-chunk-2]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<error/rlang_error>
Error in `utils::download.file()`:
! cannot open URL 'https://github.com/kevinwang09/learningtower/raw/master/student_full_data/student_2018.rds'
---
Backtrace:
    ▆
 1. └─learningtower::load_student("2018")
 2.   └─learningtower:::download_single_student(year = this_year)
 3.     └─utils::download.file(url = url_git, destfile = tmp)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Error: processing vignette 'learningtower_school.Rmd' failed with diagnostics:
cannot open URL 'https://github.com/kevinwang09/learningtower/raw/master/student_full_data/student_2018.rds'
--- failed re-building 'learningtower_school.Rmd'

--- re-building 'learningtower_student.Rmd' using rmarkdown
trying URL 'https://github.com/kevinwang09/learningtower/raw/master/student_full_data/student_2012.rds'

Quitting from learningtower_student.Rmd:100-143 [unnamed-chunk-3]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<error/rlang_error>
Error in `utils::download.file()`:
! cannot open URL 'https://github.com/kevinwang09/learningtower/raw/master/student_full_data/student_2012.rds'
---
Backtrace:
    ▆
 1. └─learningtower::load_student(c(2012, 2018))
 2.   └─learningtower:::download_single_student(year = this_year)
 3.     └─utils::download.file(url = url_git, destfile = tmp)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Error: processing vignette 'learningtower_student.Rmd' failed with diagnostics:
cannot open URL 'https://github.com/kevinwang09/learningtower/raw/master/student_full_data/student_2012.rds'
--- failed re-building 'learningtower_student.Rmd'

SUMMARY: processing the following files failed:
  'learningtower_school.Rmd' 'learningtower_student.Rmd'

Error: Vignette re-building failed.
Execution halted