Thank you for the details. I’ve checked your feed and it’s valid: http://validator.w3.org/check?uri=http%3A%2F%2Fwww.lindamendible.com%2Ffeed&charset=%28detect+automatically%29&doctype=Inline&group=0&user-agent=W3C_Validator%2F1.3+http%3A%2F%2Fvalidator.w3.org%2Fservices
There is nothing wrong with the theme. Please contact the bloglovin support team regarding this problem. Sorry.
Regards,
Eva Kemp.