I was working on a client’s shopping cart (WP e-commerce plugin, custom theme). I edited a post (product page), and clicked the “update” button; received this error message:
Warning: Cannot modify header information – headers already sent by (output started at /home/coffee/public_html/TestDEV/wp-content/themes/roasthouse/functions.php:1) in /home/coffee/public_html/TestDEV/wp-includes/pluggable.php on line 934
Can anyone shed some light as to the cause?
BTW, this occurred after I copied the wp-content/theme/ourcustomtheme to the test folder under public-html in cPanel. There was an issue with the style.css file not making it, but I eventually got that copied over as well.