Debug errors after move

I have rtf&r pro. I’ve now moved to a new host. After turning on debug I get the following error. Whether that will solve it or not I don’t know but my download link expired so I can try to reinstall a fresh copy.

Warning: Cannot modify header information – headers already sent by (output started at /home/yadayada/public_html/yadayada.com/wp-content/plugins/real-time-find-and-replace-pro/real-time-find-and-replace-pro.php:1011) in /home/yadayada/public_html/yadayada.com/wp-includes/pluggable.php on line 1179