Error(s) in re-building vignettes:
  ...
--- re-building ‘case_fatality_rate.Rmd’ using rmarkdown
── Attaching packages ────────────────────────────────── tidyverse 1.2.1 ──
✔ ggplot2 3.1.0       ✔ purrr   0.3.2  
✔ tibble  2.1.1       ✔ dplyr   0.8.0.1
✔ tidyr   0.8.3       ✔ stringr 1.4.0  
✔ readr   1.3.1       ✔ forcats 0.4.0  
── Conflicts ───────────────────────────────────── tidyverse_conflicts() ──
✖ dplyr::filter() masks stats::filter()
✖ dplyr::lag()    masks stats::lag()
Loading required package: viridisLite

Attaching package: 'scales'

The following object is masked from 'package:viridis':

    viridis_pal

The following object is masked from 'package:purrr':

    discard

The following object is masked from 'package:readr':

    col_factor

Quitting from lines 58-67 (case_fatality_rate.Rmd) 
Error: processing vignette 'case_fatality_rate.Rmd' failed with diagnostics:
VECTOR_ELT() can only be applied to a 'list', not a 'double'
--- failed re-building ‘case_fatality_rate.Rmd’

--- re-building ‘case_study_global_trends.Rmd’ using rmarkdown
── Attaching packages ────────────────────────────────── tidyverse 1.2.1 ──
✔ ggplot2 3.1.0       ✔ purrr   0.3.2  
✔ tibble  2.1.1       ✔ dplyr   0.8.0.1
✔ tidyr   0.8.3       ✔ stringr 1.4.0  
✔ readr   1.3.1       ✔ forcats 0.4.0  
── Conflicts ───────────────────────────────────── tidyverse_conflicts() ──
✖ dplyr::filter() masks stats::filter()
✖ dplyr::lag()    masks stats::lag()
Loading required package: viridisLite
Downloading data from: https://extranet.who.int/tme/generateCSV.asp?ds=estimates
Saving data to: /home/hornik/tmp/scratch/RtmpP7sZid/TB_burden.rds
Downloading data from: https://extranet.who.int/tme/generateCSV.asp?ds=mdr_rr_estimates
Saving data to: /home/hornik/tmp/scratch/RtmpP7sZid/MDR_TB.rds
Joining TB burden data and MDR TB data.
Downloading data from: https://extranet.who.int/tme/generateCSV.asp?ds=dictionary
Saving data to: /home/hornik/tmp/scratch/RtmpP7sZid/TB_data_dict.rds
Quitting from lines 48-52 (case_study_global_trends.Rmd) 
Error: processing vignette 'case_study_global_trends.Rmd' failed with diagnostics:
VECTOR_ELT() can only be applied to a 'list', not a 'double'
--- failed re-building ‘case_study_global_trends.Rmd’

--- re-building ‘intro.Rmd’ using rmarkdown

Attaching package: 'dplyr'

The following objects are masked from 'package:stats':

    filter, lag

The following objects are masked from 'package:base':

    intersect, setdiff, setequal, union

Quitting from lines 78-79 (intro.Rmd) 
Error: processing vignette 'intro.Rmd' failed with diagnostics:
VECTOR_ELT() can only be applied to a 'list', not a 'double'
--- failed re-building ‘intro.Rmd’

SUMMARY: processing the following files failed:
  ‘case_fatality_rate.Rmd’ ‘case_study_global_trends.Rmd’ ‘intro.Rmd’

Error: Vignette re-building failed.
Execution halted