Hi! I a getting the folowing messages when i try to update any page of my website:
Warning: call_user_func_array() expects parameter 1 to be a valid callback, class ‘WP1S_Class’ does not have a method ‘wp1s_upgrade_save’ in /home/stelvipro/public_html/wp-includes/plugin.php on line 524
Warning: Cannot modify header information – headers already sent by (output started at /home/stelvipro/public_html/wp-includes/plugin.php:524) in /home/stelvipro/public_html/wp-admin/post.php on line 197
Warning: Cannot modify header information – headers already sent by (output started at /home/stelvipro/public_html/wp-includes/plugin.php:524) in /home/stelvipro/public_html/wp-includes/pluggable.php on line 1174
