Error(s) in re-building vignettes:
  ...
--- re-building ‘finding-thresholds.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
Warning in block_exec(params) :
  Failed to tidy R code in chunk 'create-high-low'. Reason:
Error in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]) : 
  there is no package called 'vctrs'

Warning in block_exec(params) :
  Failed to tidy R code in chunk 'plot-high-low'. Reason:
Error in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]) : 
  there is no package called 'vctrs'

Quitting from lines 43-49 (finding-thresholds.Rmd) 
Error: processing vignette 'finding-thresholds.Rmd' failed with diagnostics:
there is no package called 'ggplot2'
--- failed re-building ‘finding-thresholds.Rmd’

--- re-building ‘thresholding-image-stacks.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
Warning in block_exec(params) :
  Failed to tidy R code in chunk '50-tif'. Reason:
Error in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]) : 
  there is no package called 'vctrs'

Quitting from lines 44-47 (thresholding-image-stacks.Rmd) 
Error: processing vignette 'thresholding-image-stacks.Rmd' failed with diagnostics:
there is no package called 'vctrs'
--- failed re-building ‘thresholding-image-stacks.Rmd’

--- re-building ‘thresholding-images.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
Warning in block_exec(params) :
  Failed to tidy R code in chunk 'load libraries'. Reason:
Error in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]) : 
  there is no package called 'vctrs'

Warning in block_exec(params) :
  Failed to tidy R code in chunk 'the image'. Reason:
Error in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]) : 
  there is no package called 'vctrs'

Quitting from lines 39-44 (thresholding-images.Rmd) 
Error: processing vignette 'thresholding-images.Rmd' failed with diagnostics:
there is no package called 'vctrs'
--- failed re-building ‘thresholding-images.Rmd’

SUMMARY: processing the following files failed:
  ‘finding-thresholds.Rmd’ ‘thresholding-image-stacks.Rmd’
  ‘thresholding-images.Rmd’

Error: Vignette re-building failed.
Execution halted