Error(s) in re-building vignettes:
--- re-building ‘using_ggmcmc.Rmd’ using rmarkdown
Loading required package: dplyr

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

Loading required package: tidyr
Loading required package: ggplot2
Warning in bind_rows_(x, .id) :
  Unequal factor levels: coercing to character
Warning in bind_rows_(x, .id) :
  binding character and factor vector, coercing into character vector
Warning in bind_rows_(x, .id) :
  binding character and factor vector, coercing into character vector
Warning: Column `County` joining factor and character vector, coercing into character vector
dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'using_ggmcmc.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘using_ggmcmc.Rmd’

--- re-building ‘v70i09.Rnw’ using knitr
Loading required package: dplyr

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

Loading required package: tidyr
Loading required package: ggplot2
Loading required package: gridExtra

Attaching package: 'gridExtra'

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

    combine

Fontconfig error: Cannot load default config file
Warning: `data_frame()` is deprecated as of tibble 1.1.0.
Please use `tibble()` instead.
This warning is displayed once every 8 hours.
Call `lifecycle::last_warnings()` to see where this warning was generated.
Joining, by = "Parameter"
Warning: Column `Parameter` joining factor and character vector, coercing into character vector
--- finished re-building ‘v70i09.Rnw’

SUMMARY: processing the following file failed:
  ‘using_ggmcmc.Rmd’

Error: Vignette re-building failed.
Execution halted