Display of RSS feed pages in latest browsers, Chrm & FF

RSS feed is not showing normal, formatted web pages as it used to in previous versions of Elgg. With default and fresh install (no other plugins) of Elgg 3.3.5 I am getting the following at  ... elgg/blog/owner/user1?view=rss

This XML file does not appear to have any style information associated with it. The document tree is shown below. 
<rss version="2.0">
<channel>
<title>el 355: user1's blogs</title>
<link>.../elg/blog/owner/user1</link>
<atom:link href="..." rel="self" type="application/rss+xml"/>
<description></description>
<item>
<guid isPermaLink="true">
https://....
<pubDate>Tue, 19 May 2020 15:28:30 +0000</pubDate>
<link>
https://...
</link>
<title>Are you an individual </title>
<description>
<p>some text</p>
</description>
<dc:creator>user1</dc:creator>
</item>
</channel>
</rss>