RSS not working properly

I’m having trouble with the RSS feed on my blog. The comments RSS feed works fine, but when I click on the main RSS feed I get this message:

XML Parsing Error: not well-formed
Location: https://www.buymeaniphone.com/?feed=rss2
Line Number 7, Column 122: xmlns:creativeCommons=”https://backend.userland.com/creativeCommonsRssModule” xmlns:media=”https://search.yahoo.com/mrss/”xmlns:itunes=”https://www.itunes.com/dtds/podcast-1.0.dtd”

I’m not familiar at all with RSS feeds so I don’t even know where to start. I tried replacing the wp-rss.php and wp-rss2.php files and that didn’t do anything. Any help would be appreciated. Here’s the link to the actual feed that isn’t working:

• https://www.buymeaniphone.com/?feed=rss2