title: About theme (hugo-academic) in blogdown
body: <p>I am trying to install hugo-academic theme in blogdown. Within my site directory I ran R and installed with </p>
  
  <pre><code>blogdown::install_theme("gcushen/hugo-academic")
  </code></pre>
  
  <p>After installing I edited the config.toml file as shown below:</p>
  
  <pre><code>baseurl = "/"
  relativeurls = true
  languageCode = "en-us"
  title = "A Hugo website"
  theme = "hugo-academic"
  googleAnalytics = ""
  disqusShortname = ""
  ignoreFiles = ["\\.Rmd$", "_files$", "_cache$"]
  </code></pre>
  
  <p>After that when I try to serve site with 
      <code>blogdown::serve_site()</code>, 
  I get the following error:</p>
  
  <pre><code>Started building sites ...
  ERROR 2017/06/01 20:02:50 Error while rendering "page": template: theme/_default/single.html:10:7: executing "theme/_default/single.html" at &lt;partial "article_met...&gt;: error calling partial: template: theme/partials/article_metadata.html:7:24: executing "theme/partials/article_metadata.html" at &lt;$.Site.Params.date_f...&gt;: invalid value; expected string
  Started building sites ...
  ERROR 2017/06/01 20:02:50 Error while rendering "page": template: theme/_default/single.html:10:7: executing "theme/_default/single.html" at &lt;partial "article_met...&gt;: error calling partial: template: theme/partials/article_metadata.html:7:24: executing "theme/partials/article_metadata.html" at &lt;$.Site.Params.date_f...&gt;: invalid value; expected string
  The system cannot find the path specified.
  Error in shell(cmd, mustWork = TRUE, intern = intern) :
    '"C:\Users\Suman\AppData\Roaming\Hugo\hugo.exe" -b / -D -F -d "public" -t hugo-academic' execution failed with error code 1
  In addition: Warning messages:
  1: running command '"C:\Users\Suman\AppData\Roaming\Hugo\hugo.exe" -b / -D -F -d "public" -t hugo-academic' had status 65535
  2: running command '"C:\Users\Suman\AppData\Roaming\Hugo\hugo.exe" -b / -D -F -d "public" -t hugo-academic' had status 65535
  3: running command 'C:\WINDOWS\system32\cmd.exe /c "C:\Users\Suman\AppData\Roaming\Hugo\hugo.exe" -b / -D -F -d "public" -t hugo-academic' had status 1
  </code></pre>
  
  <p>Any help to solve this?</p>
  
  <p>Note: I am on Windows 10 64 bit OS.</p>