Bug in 2.1.5 firewall logs widget

[p1erre]

I get the following error while clicking on an IP address on the firewall logs widget

   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

	<title>xxx - Diagnostics: DNS Lookup</title>

[Authority]

I had the same issue, it is a known bug.
https://redmine.pfsense.org/issues/3829

[phil.davis]

The same effect is happening on a 2.2 development system also. I get the effect with 2.1.5 and 2.2 and Firefox browser (so it isn't just a specific browser thing). Can't immediately see an obvious change that caused this.