XML declaration allowed only at the start of the document

Question

My blog feed show error today:

This page contains the following errors:

error on line 2 at column 6: XML declaration allowed only at the s

Answer 1

There must be more than 1 blank line at the very end of the functions.php file if you are using wordpress.

Just remove these blank lines and the error would go off.

If you want to know more about the error, read this article: http://www.am22tech.com/fix-xml-declaration-rss-feed-error/