fdtw

Thanks, everything works now

Hi, thanks for the reply.
The plugin name is VikBooking and the error has occurred in the plugin backend when I try to open popup menu.

I put in ../wp-content/plugins/jeg-elementor-kit/helper.php:542, jkit_remove_form_control() function

add_filter( 'jkit_remove_form_control_conditions', 'callback' ); 

but it returns the error

Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'callback' not found or invalid function name in /home/customer/www/sitename/public_html/wp-includes/class-wp-hook .php online 308
Warning: Cannot modify header information - headers already sent by (output started at /home/customer/www/sitename/public_html/wp-includes/class-wp-hook.php:308) in /home/customer/www/sitename/ public_html/wp-admin/admin-header.php online 9

did I do something wrong?

Thank You