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 {
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  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","Sun, 26 Mar 2023 14:27:27 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=dYMAp%2FodKxFHvjmRpIOmNc0bSVjfe68jf%2BYlB%2F1ILbSVPFTZBDpx8bs1ykYTpDrsDZQDkHjKFmtkbp2afLWfJdmpF94uJF3EFaUxvsBCS7DV2Bw%2BwImVPgkOWgqfg07G\"}],\"group\":\"cf-nel\",\"max_age\":604800}"),("NEL","{\"success_fraction\":0,\"report_to\":\"cf-nel\",\"max_age\":604800}"),("Vary","Accept-Encoding"),("Server","cloudflare"),("CF-RAY","7ae01312583888a7-LHR"),("alt-svc","h3=\":443\"; 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","Sun, 26 Mar 2023 14:27:27 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=StVGFmsrVKooxg8zFaiLrE1XPlEgLnvWWXhQxNnGWFNrMqUANfcLLZTuHjnM7uHy74GxGpehhqzTWWCmCRNdc9ZqVGDBCqccUfMXBIhNKlrMpGi9HA8zKdToyYUVe6K8\"}],\"group\":\"cf-nel\",\"max_age\":604800}"),("NEL","{\"success_fraction\":0,\"report_to\":\"cf-nel\",\"max_age\":604800}"),("Vary","Accept-Encoding"),("Server","cloudflare"),("CF-RAY","7ae01311af3488a7-LHR"),("alt-svc","h3=\":443\"; 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","Sun, 26 Mar 2023 14:27:27 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=eEbA5m%2BPIlRXBul5K50WdUKENlsyEg9nLRNc6CuDRvpOr%2BXxYC%2FfQJXh6d0pVQzTO7UvmmfTmpyEmC%2FfWLB%2BFQw8%2BxWVXSLmxP20edwiGfvuc0XWTN3LV2G9JMDx5YBK\"}],\"group\":\"cf-nel\",\"max_age\":604800}"),("NEL","{\"success_fraction\":0,\"report_to\":\"cf-nel\",\"max_age\":604800}"),("Vary","Accept-Encoding"),("Server","cloudflare"),("CF-RAY","7ae01310fe1b88a7-LHR"),("alt-svc","h3=\":443\"; 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","Sun, 26 Mar 2023 14:27:27 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=v5UoIaF2o%2FaOcsrGJ20yQkUiWuoteYjGgoDQW%2BULpi4Q3oUon%2F%2Fai%2FSsNawI7o%2FePxR4QJUQ38pCEI1%2BWB8S3csHX5mQ1GsFuJkkuFmOOVuGEVzshFIdRO%2F7rElxXB0F\"}],\"group\":\"cf-nel\",\"max_age\":604800}"),("NEL","{\"success_fraction\":0,\"report_to\":\"cf-nel\",\"max_age\":604800}"),("Vary","Accept-Encoding"),("Server","cloudflare"),("CF-RAY","7ae013104d1588a7-LHR"),("alt-svc","h3=\":443\"; 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","Sun, 26 Mar 2023 14:27:27 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=ffRHaXY9NlgVQKkIrSnyWsxGGz1I9VBDT0Bf2B24mqaKg6URhPc3UxjFTjRk1sw%2B4C9E5dX7bxM%2BGtk%2FKPb%2Fw0OsenAJgWXokKTXEn3rsX8htKu4yiu4RNnMIJCfIwtj\"}],\"group\":\"cf-nel\",\"max_age\":604800}"),("NEL","{\"success_fraction\":0,\"report_to\":\"cf-nel\",\"max_age\":604800}"),("Vary","Accept-Encoding"),("Server","cloudflare"),("CF-RAY","7ae0130fab9788a7-LHR"),("alt-svc","h3=\":443\"; 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","Sun, 26 Mar 2023 14:27:27 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=54NB5kYK2nmnHOSYM58KmwxVELJqTDm4OjO9tFzlHzOUgH1LQPPqIrRCG0rsVDUfDdjQ%2FlSKTYJfuS7bnPa3PBIwAvjkrg37B5XRy5LrulwZa%2Bp0ylW1zGFzQs0rOkyx\"}],\"group\":\"cf-nel\",\"max_age\":604800}"),("NEL","{\"success_fraction\":0,\"report_to\":\"cf-nel\",\"max_age\":604800}"),("Vary","Accept-Encoding"),("Server","cloudflare"),("CF-RAY","7ae0130eea5d88a7-LHR"),("alt-svc","h3=\":443\"; 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","Sun, 26 Mar 2023 14:27:27 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=rdrDH0BT33EDQQGp5BCfTTXlwUDc6%2BO1xEx6Zo8Ke4I9dm3A4FYzMgCkC7AwAc1hPrj%2Ff%2FPHHk1IUmDngsKos5f6nK%2Fs7dohsA2%2Fo2ncFeQoiyIcH34AyNpALMIl9Wnv\"}],\"group\":\"cf-nel\",\"max_age\":604800}"),("NEL","{\"success_fraction\":0,\"report_to\":\"cf-nel\",\"max_age\":604800}"),("Vary","Accept-Encoding"),("Server","cloudflare"),("CF-RAY","7ae0130e496b88a7-LHR"),("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