My solution was very simple. for the error
Warning: Cannot modify header information - headers already sent by (output started at /home/neyofan/public_html/wp-includes/widgets.php:654) in /home/neyofan/public_html/wp-includes/pluggable.php on line 689
In the bottom of the file
wp-config.php at the bottom of the file there are two blank lines after the close of the php code
?> in like line 45 there are two blank lines in 46 and 47 , delete those two lines and the problem is solved. That is usaully the problem with the “header is already sent error message”
Hope this helps some people.
