Error(s) in re-building vignettes:
  ...
--- re-building ‘shiny_app_manual.Rmd’ using rmarkdown
--- finished re-building ‘shiny_app_manual.Rmd’

--- re-building ‘troubleshooting.Rmd’ using rmarkdown
--- finished re-building ‘troubleshooting.Rmd’

--- re-building ‘vignette_fluorescence.Rmd’ using rmarkdown
Could not fetch https://raw.githubusercontent.com/citation-style-language/styles/master/research-institute-for-nature-and-forest.csl
HttpExceptionRequest Request {
  host                 = "raw.githubusercontent.com"
  port                 = 443
  secure               = True
  requestHeaders       = []
  path                 = "/citation-style-language/styles/master/research-institute-for-nature-and-forest.csl"
  queryString          = ""
  method               = "GET"
  proxy                = Nothing
  rawBody              = False
  redirectCount        = 10
  responseTimeout      = ResponseTimeoutDefault
  requestVersion       = HTTP/1.1
  proxySecureMode      = ProxySecureWithConnect
}
 ConnectionTimeout
Error: processing vignette 'vignette_fluorescence.Rmd' failed with diagnostics:
pandoc document conversion failed with error 61
--- failed re-building ‘vignette_fluorescence.Rmd’

--- re-building ‘vignette_growth.Rmd’ using rmarkdown
Could not fetch https://raw.githubusercontent.com/citation-style-language/styles/master/research-institute-for-nature-and-forest.csl
HttpExceptionRequest Request {
  host                 = "raw.githubusercontent.com"
  port                 = 443
  secure               = True
  requestHeaders       = []
  path                 = "/citation-style-language/styles/master/research-institute-for-nature-and-forest.csl"
  queryString          = ""
  method               = "GET"
  proxy                = Nothing
  rawBody              = False
  redirectCount        = 10
  responseTimeout      = ResponseTimeoutDefault
  requestVersion       = HTTP/1.1
  proxySecureMode      = ProxySecureWithConnect
}
 ConnectionTimeout
Error: processing vignette 'vignette_growth.Rmd' failed with diagnostics:
pandoc document conversion failed with error 61
--- failed re-building ‘vignette_growth.Rmd’

SUMMARY: processing the following files failed:
  ‘vignette_fluorescence.Rmd’ ‘vignette_growth.Rmd’

Error: Vignette re-building failed.
Execution halted