PHP Warning: Cannot modify header information - headers already sent by
Hi:
Everyday we are getting below PHP warning in our error_log file.
[12-Dec-2019 14:46:34 UTC] PHP Warning: Cannot modify header information - headers already sent by (output started at /home/shop/public_html/
wp-content/themes/classipress/wrapper.php:11) in /home/shop/public_html/
wp-includes/pluggable.php on line 1265
[12-Dec-2019 14:46:34 UTC] PHP Warning: Cannot modify header information - headers already sent by (output started at /home/shop/public_html/
wp-content/themes/classipress/wrapper.php:11) in /home/shop/public_html/
wp-includes/pluggable.php on line 1268
[12-Dec-2019 15:52:21 UTC] PHP Warning: Cannot modify header information - headers already sent by (output started at /home/shop/public_html/
wp-content/themes/classipress/wrapper.php:11) in /home/shop/public_html/
wp-includes/pluggable.php on line 1265
[12-Dec-2019 15:52:21 UTC] PHP Warning: Cannot modify header information - headers already sent by (output started at /home/shop/public_html/
wp-content/themes/classipress/wrapper.php:11) in /home/shop/public_html/
wp-includes/pluggable.php on line 1268
[12-Dec-2019 16:09:26 UTC] PHP Warning: Cannot modify header information - headers already sent by (output started at /home/shop/public_html/
wp-content/themes/classipress/wrapper.php:11) in /home/shop/public_html/
wp-includes/pluggable.php on line 1265
[12-Dec-2019 16:09:26 UTC] PHP Warning: Cannot modify header information - headers already sent by (output started at /home/shop/public_html/
wp-content/themes/classipress/wrapper.php:11) in /home/shop/public_html/
wp-includes/pluggable.php on line 1268
Please suggest us a fixing to stop this warning.
Thank you.