Unable to click link to get rid of tour popup

I'm trying to click on the 'End Tour' link in order to close a perky popup, as in the attached screenshot. My goal is to get rid of the popup entirely, as it is stopping me from moving past that screen during my tests.

I have tried to using cssSelector, xpath and linkText, none of which seem to be working. See the HTML bellow and the browser console of the inspected popup element shown below:

<div class="popover-navigation">
    <a data-role="prev" class="disabled" tabindex="-1">« Prev</a>
    <span data-role="separator">&nbsp;&nbsp;</span>
    <a data-role="next">Next »</a>
    <a data-role="end">End Tour</a>
</div>