Error(s) in re-building vignettes:
--- re-building 'ezknitr.Rmd' using rmarkdown
Could not fetch https://travis-ci.org/ropenscilabs/ezknitr.svg?branch=master
HttpExceptionRequest Request {
  host                 = "travis-ci.org"
  port                 = 443
  secure               = True
  requestHeaders       = []
  path                 = "/ropenscilabs/ezknitr.svg"
  queryString          = "?branch=master"
  method               = "GET"
  proxy                = Nothing
  rawBody              = False
  redirectCount        = 10
  responseTimeout      = ResponseTimeoutDefault
  requestVersion       = HTTP/1.1
}
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ma=86400, h3-29=\":443\"; ma=86400")], responseBody = "<html>\r\n<head><title>308 Permanent Redirect</title></head>\r\n<body>\r\n<center><h1>308 Permanent Redirect</h1></center>\r\n<hr><center>openresty</center>\r\n</body>\r\n</html>\r\n", responseCookieJar = CJ {expose = []}, responseClose' = ResponseClose},Response {responseStatus = Status {statusCode = 308, statusMessage = "Permanent Redirect"}, responseVersion = HTTP/1.1, responseHeaders = [("Date","Mon, 27 Mar 2023 10:46:16 GMT"),("Content-Type","text/html"),("Transfer-Encoding","chunked"),("Connection","keep-alive"),("Location","https://travis-ci.org/ropenscilabs/ezknitr.svg?branch=master"),("CF-Cache-Status","BYPASS"),("Report-To","{\"endpoints\":[{\"url\":\"https:\\/\\/a.nel.cloudflare.com\\/report\\/v3?s=L20udkmtcHxljUg056KUsZgf95hIVCfP69Z073jLbpv%2BjDPtmPIWy%2BucnTFyX0D3hef0idEcv%2BpXE1u8hxWnFfxM5V%2Bh%2FZNJN%2FdHZxiHIFiop7RsHFsMS26UPRODpKr%2B\"}],\"group\":\"cf-nel\",\"max_age\":604800}"),("NEL","{\"success_fraction\":0,\"report_to\":\"cf-nel\",\"max_age\":604800}"),("Vary","Accept-Encoding"),("Server","cloudflare"),("CF-RAY","7ae70c71cdd468fb-FRA"),("alt-svc","h3=\":443\"; 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Error: processing vignette 'ezknitr.Rmd' failed with diagnostics:
pandoc document conversion failed with error 61
--- failed re-building 'ezknitr.Rmd'

SUMMARY: processing the following file failed:
  'ezknitr.Rmd'

Error: Vignette re-building failed.
Execution halted