title: Can't find ruby element with selenium
body: <p>I've been trying since yesterday to find a nested_form link_to_add button using selenium. When I copy its XPATH from chrome and paste it into the script:</p>
  
  <pre><code>element = browser.find_element(:xpath =&gt; "//*[@id='tabpage_1']/a")
  </code></pre>
  
  <p>I get the following error when running selenium:</p>
  
  <pre><code>&lt;main&gt;': undefined method `*' for //:Regexp (NoMethodError)
  </code></pre>
  
  <p>If you know of any other way detect such a element it would be very appreciated. This is the elements HTML:</p>
  
  <pre><code>&lt;a href="javascript:void(0)" class="add_nested_fields" data-association="levels"&gt;Add Level&lt;/a&gt;
  </code></pre>