Plugin has corrupted my rss feed – Please help!

Hi,

I installe the plugin and now my rss is not working correctly. Please see the report:
http://validator.w3.org/feed/check.cgi?url=http%3A%2F%2Fwww.cloudeddottedmind.com%2Ffeed%2F

What can I do to fix this? My rss is essential as it feeds into Bloglovin.

Thank you

Best regards
Mathilde

https://ww.wp.xz.cn/plugins/organize-series/