Error(s) in re-building vignettes:
  ...
--- re-building ‘anchored_binary.Rmd’ using rmarkdown
[WARNING] Deprecated: --highlight-style. Use --syntax-highlighting instead.
--- finished re-building ‘anchored_binary.Rmd’

--- re-building ‘anchored_survival.Rmd’ using rmarkdown
[WARNING] Deprecated: --highlight-style. Use --syntax-highlighting instead.
--- finished re-building ‘anchored_survival.Rmd’

--- re-building ‘calculating_weights.Rmd’ using rmarkdown
[WARNING] Deprecated: --highlight-style. Use --syntax-highlighting instead.
--- finished re-building ‘calculating_weights.Rmd’

--- re-building ‘introduction.Rmd’ using rmarkdown
[WARNING] Deprecated: --highlight-style. Use --syntax-highlighting instead.
Could not fetch http://www.zotero.org/styles/elsevier-vancouver
HttpExceptionRequest Request {
  host                 = "www.zotero.org"
  port                 = 443
  secure               = True
  requestHeaders       = []
  path                 = "/styles/elsevier-vancouver"
  queryString          = ""
  method               = "GET"
  proxy                = Nothing
  rawBody              = False
  redirectCount        = 10
  responseTimeout      = ResponseTimeoutDefault
  requestVersion       = HTTP/1.1
  proxySecureMode      = ProxySecureWithConnect
}
 (StatusCodeException (Response {responseStatus = Status {statusCode = 504, statusMessage = "Gateway Time-out"}, responseVersion = HTTP/1.1, responseHeaders = [("Server","awselb/2.0"),("Date","Thu, 30 Oct 2025 15:57:10 GMT"),("Content-Type","text/html"),("Content-Length","132"),("Connection","keep-alive")], responseBody = (), responseCookieJar = CJ {expose = []}, responseClose' = ResponseClose, responseOriginalRequest = Request {
  host                 = "www.zotero.org"
  port                 = 443
  secure               = True
  requestHeaders       = []
  path                 = "/styles/elsevier-vancouver"
  queryString          = ""
  method               = "GET"
  proxy                = Nothing
  rawBody              = False
  redirectCount        = 10
  responseTimeout      = ResponseTimeoutDefault
  requestVersion       = HTTP/1.1
  proxySecureMode      = ProxySecureWithConnect
}
, responseEarlyHints = []}) "<html>\r\n<head><title>504 Gateway Time-out</title></head>\r\n<body>\r\n<center><h1>504 Gateway Time-out</h1></center>\r\n</body>\r\n</html>\r\n")
Error: processing vignette 'introduction.Rmd' failed with diagnostics:
pandoc document conversion failed with error 61
--- failed re-building ‘introduction.Rmd’

--- re-building ‘kaplan_meier_plots.Rmd’ using rmarkdown
[WARNING] Deprecated: --highlight-style. Use --syntax-highlighting instead.
--- finished re-building ‘kaplan_meier_plots.Rmd’

--- re-building ‘unanchored_binary.Rmd’ using rmarkdown
[WARNING] Deprecated: --highlight-style. Use --syntax-highlighting instead.
--- finished re-building ‘unanchored_binary.Rmd’

--- re-building ‘unanchored_survival.Rmd’ using rmarkdown
[WARNING] Deprecated: --highlight-style. Use --syntax-highlighting instead.
--- finished re-building ‘unanchored_survival.Rmd’

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

Error: Vignette re-building failed.
Execution halted