Evertime I update to the newest version of WP my feed is invalid. I've see multiple posts about this, but can't seem to figure out which exact file I need to edit to fix it. The Fix RSS Feed plugin used to work, but not any longer.
Thesis_16, WP 3.61
This feed does not validate.
line 1, column 0: XML parsing error: <unknown>:1:1: not well-formed (invalid token) [help]
In addition, interoperability with the widest range of feed readers could be improved by implementing the following recommendation.
"text/xml" media type is not specific enough [help]