title: Error boxes when running markdown in R Studio
body: <p>I'm trying to run a markdown document from R Studio, in it i'm loading the gapminder data using library(), as shown below:</p>
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code>```{r}
  library(gapminder)
  ```
  ```{r}
  gapminder
  ```</code></pre>
  </div>
  </div>
  </p>
  <p>However, when visualizing the HTML, I get this error messages:
  [error messages from HTML doc][1]</p>
  <p>Can someone help me understand this?
  [1]: <a href="https://i.stack.imgur.com/6LO7e.png" rel="nofollow noreferrer">https://i.stack.imgur.com/6LO7e.png</a></p>