As found when testing MDLQA-10554

https://qa.moodle.net/mod/data/view.php?id=16

The database activity RSS feed in Firefox took you to a blank page and in Chrome took you to a rss.xml page with the following error message:

<item>
<title>RSS Error</title>
<link>https://qa.moodle.net</link>
<pubDate>Tue, 02 May 2017 11:46:48 GMT</pubDate>
<description>Error reading RSS data</description>
<guid isPermaLink="true">https://qa.moodle.net</guid>
</item>