Running examples in 'rchallenge-Ex.R' failed
The error most likely occurred in:

> ### Name: icon
> ### Title: HTML code for icons. Currently only supports Font Awesome icons.
> ### Aliases: icon
> 
> ### ** Examples
> 
> rmd <- '
+ ```{r}
+ library(rchallenge)
+ ```
+ <link rel="stylesheet" 
+  href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css">
+ `r icon("fa-user")`
+ `r icon("fa-user fa-lg")`
+ `r icon("fa-user fa-2x")`
+ `r icon("fa-user fa-3x")`
+ `r icon("fa-user fa-3x fa-border")`
+ '
> file <- tempfile()
> cat(rmd, file=file)
> writeLines(readLines(file))

```{r}
library(rchallenge)
```
<link rel="stylesheet" 
 href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css">
`r icon("fa-user")`
`r icon("fa-user fa-lg")`
`r icon("fa-user fa-2x")`
`r icon("fa-user fa-3x")`
`r icon("fa-user fa-3x fa-border")`
> rmarkdown::render(file)
"D:/compiler/pandoc/pandoc" +RTS -K512m -RTS file1dd4c975e14.utf8.md --to html4 --from markdown+autolink_bare_uris+ascii_identifiers+tex_math_single_backslash --output file1dd4c975e14.html --smart --email-obfuscation none --self-contained --standalone --section-divs --template "D:\temp\Rtmpa6Ltam\RLIBS_314c813fa4983\rmarkdown\rmd\h\default.html" --no-highlight --variable highlightjs=1 --variable "theme:bootstrap" --include-in-header "D:\temp\RtmpmyQ72C\rmarkdown-str1dd4c38b03e63.html" --mathjax --variable "mathjax-url:https://mathjax.rstudio.com/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML" 
pandoc.exe: Could not fetch https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css
HttpExceptionRequest Request {
  host                 = "maxcdn.bootstrapcdn.com"
  port                 = 443
  secure               = True
  requestHeaders       = []
  path                 = "/font-awesome/4.6.3/css/font-awesome.min.css"
  queryString          = ""
  method               = "GET"
  proxy                = Nothing
  rawBody              = False
  redirectCount        = 10
  responseTimeout      = ResponseTimeoutDefault
  requestVersion       = HTTP/1.1
}
 (InternalException (HostCannotConnect "maxcdn.bootstrapcdn.com" [connect: failed (Connection timed out (WSAETIMEDOUT))]))
Error: pandoc document conversion failed with error 67
Execution halted