RSS Feed Fatal Error Cannot use object of type stdClass as array

I get error below when I try to browse to rss feed.
This page contains the following errors:

error on line 31 at column 25: Extra content at the end of the document
Below is a rendering of the page up to the first error.

Dothan Buy Sell Trade https://www.dothanbuyselltrade.com Post Locally, Post For Free Fri, 03 Apr 2015 16:25:20 +0000 en-US hourly 1 https://www.ads-software.com/?v=4.1.1 1944 WWII M15 Grenade Launcher Site For M1 Carbine Lot of 2 https://www.dothanbuyselltrade.com/ad/1944-wwii-m15-grenade-launcher-site-for-m1-carbine-set-of-2/ https://www.dothanbuyselltrade.com/ad/1944-wwii-m15-grenade-launcher-site-for-m1-carbine-set-of-2/#comments Wed, 01 Apr 2015 06:44:44 +0000 Administrator https://www.dothanbuyselltrade.com/?post_type=ad&p=538

When I try to validate feed I get the following error

<?xml version=”1.0″ encoding=”UTF-8″?><rss version=”2.0″
xmlns:content=”https://purl.org/rss/1.0/modules/content/&#8221;
xmlns:wfw=”https://wellformedweb.org/CommentAPI/&#8221;
xmlns:dc=”https://purl.org/dc/elements/1.1/&#8221;
xmlns:atom=”https://www.w3.org/2005/Atom&#8221;
xmlns:sy=”https://purl.org/rss/1.0/modules/syndication/&#8221;
xmlns:slash=”https://purl.org/rss/1.0/modules/slash/&#8221;
xmlns:media=”https://search.yahoo.com/mrss/&#8221;
xmlns:georss=”https://www.georss.org/georss”&gt;

<channel>
<title>Dothan Buy Sell Trade</title>
<atom:link href=”https://www.dothanbuyselltrade.com/feed/&#8221; rel=”self” type=”application/rss+xml” />
<link>https://www.dothanbuyselltrade.com</link&gt;
<description>Post Locally, Post For Free</description>
<lastBuildDate>Fri, 03 Apr 2015 16:25:20 +0000</lastBuildDate>
<language>en-US</language>
<sy:updatePeriod>hourly</sy:updatePeriod>
<sy:updateFrequency>1</sy:updateFrequency>
<generator>https://www.ads-software.com/?v=4.1.1</generator&gt;
<item>
<title>1944 WWII M15 Grenade Launcher Site For M1 Carbine Lot of 2</title>
<link>https://www.dothanbuyselltrade.com/ad/1944-wwii-m15-grenade-launcher-site-for-m1-carbine-set-of-2/</link&gt;
<comments>https://www.dothanbuyselltrade.com/ad/1944-wwii-m15-grenade-launcher-site-for-m1-carbine-set-of-2/#comments</comments&gt;
<pubDate>Wed, 01 Apr 2015 06:44:44 +0000</pubDate>
<dc:creator>Administrator</dc:creator>
<guid isPermaLink=”false”>https://www.dothanbuyselltrade.com/?post_type=ad&p=538</guid&gt;

<description><![CDATA[
<p><b>Seller</b>:
<b>Fatal error</b>: Cannot use object of type stdClass as array in <b>/home/pickypickerton/public_html/wp-content/themes/classifiedengine/feed-rss2.php</b> on line <b>60</b>

Any help would be greatly appreciated.