title: "argument "name" is missing with no default" (R error)
body: <p>I am learning about dashboards using the R package &quot;flexdashboards&quot;. I am trying to follow the tutorial listed over here: <a href="https://rmarkdown.rstudio.com/flexdashboard/" rel="nofollow noreferrer">https://rmarkdown.rstudio.com/flexdashboard/</a></p>
  <p>I tried to copy the first line of code from this website to open the &quot;dashboard template editor&quot;:</p>
  <pre><code>library(flexdashboard)
  library(rmarkdown)
  library(rbokeh)
  library(knitr)
  
  rmarkdown::draft(&quot;dashboard.Rmd&quot;, template = &quot;flex_dashboard&quot;, package = &quot;flexdashboard&quot;)
  </code></pre>
  <p>But this results in the following error:</p>
  <pre><code>Error in editor(file = file, title = title) : argument &quot;name&quot; is missing with no default
  </code></pre>
  <p>Does anyone know why this error is appearing? Based on the instructions from the website (<a href="https://rmarkdown.rstudio.com/flexdashboard/" rel="nofollow noreferrer">https://rmarkdown.rstudio.com/flexdashboard/</a>), after entering this code a popup window should appear?</p>
  <p>Thanks</p>
  <p>UPDATE: as per the suggestion of @Ronald, I added a &quot;traceback&quot; option</p>
  <pre><code>options(error = traceback)
  
  rmarkdown::draft(&quot;dashboard.Rmd&quot;, template = &quot;flex_dashboard&quot;, package = &quot;flexdashboard&quot;)
  
  Error in editor(file = file, title = title): argument &quot;name&quot; is missing, with no default
  
  3: editor(file=file, title = title)
  2: utils::file.edit(normalizePath(file))
  1: rmarkdown::draft(&quot;dashboard.Rmd&quot;, template = &quot;flex_dashboard&quot;, package = &quot;flexdashboard&quot;)
  </code></pre>