D8 Aggregator "Feed Code Error" Cannot Display

I've seen issues relating to D7 and blank lines for this, but not D8.

Some of my feeds created with aggregator work fine, and others do not, throwing "IE cannot display this feed" and in Chrome, displaying a bunch of THEME DEBUG blocks. The weird thing is about the chrome display is that it looks like the page is trying to display 10 content nodes from MY site, not the feed that is should. Here is the top header block and one of the failed pull blocks:

Any ideas about how to fix this? Thank you,

UPDATE: if i go to http://www2.mywebsite.smurm/aggregator/sources/ , it correctly displays both feeds properly on the page. AND /aggregator/sources/1 works fine, but /aggregator/sources/2 throws the error

<!-- THEME DEBUG -->
<!-- THEME HOOK: 'views_view_rss' -->
<!-- BEGIN OUTPUT from 'themes/bullseye/templates/views/views-view-rss.html.twig' -->
<?xml version="1.0" encoding="utf-8" ?>
<rss version="2.0" xml:base="http://www2.mywebsite.smurm/aggregator/sources/2" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:og="http://ogp.me/ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:schema="http://schema.org/" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#">
  <channel>
    <title>WMUR News</title>
    <link>http://www2.mywebsite.smurm/aggregator/sources/2</link>
    <description></description>
    <language>en</language>
    
    

<!-- THEME DEBUG -->
<!-- THEME HOOK: 'views_view_row_rss' -->
<!-- BEGIN OUTPUT from 'themes/bullseye/templates/views/views-view-row-rss.html.twig' -->
<item>
  <title>Basic Page 1 example</title>
  <link>http://www2.mywebsite.smurm/node/2</link>
  <description></description>
  <pubDate>Tue, 06 Dec 2016 19:04:12 +0000</pubDate>
    <dc:creator>admin</dc:creator>
    <guid isPermaLink="false">2 at http://mywebsite.smurm</guid>
    </item>
<!-- END OUTPUT from 'themes/bullseye/templates/views/views-view-row-rss.html.twig' -->