Notice: Undefined index:

i have this error in admin and front
wordpress:5.3.2 colormag:1.4.5
I have the same plugin with Storefront theme on another website and it still works perfect, so i think the problem is with Colormag theme.

Notice: Undefined index: msg in /home/MY-WEBSITE-NAME/public_html/wp-content/plugins/PLUGIN-NME/index.php on line 17

Warning: Cannot modify header information - headers already sent by (output started at /home/MY-WEBSITE-NAME/public_html/wp-content/plugins/PLUGIN-NME/index.php:17) in /home/MY-WEBSITE-NAME/public_html/wp-includes/functions.php on line 6029

Warning: Cannot modify header information - headers already sent by (output started at /home/MY-WEBSITE-NAME/public_html/wp-content/plugins/PLUGIN-NME/index.php:17) in /home/MY-WEBSITE-NAME/public_html/wp-admin/includes/misc.php on line 1252

Warning: Cannot modify header information - headers already sent by (output started at /home/MY-WEBSITE-NAME/public_html/wp-content/plugins/PLUGIN-NME/index.php:17) in /home/MY-WEBSITE-NAME/public_html/wp-admin/admin-header.php on line 9

the mentioned plugin is a payment gateway
download of the plugin: https://gofile.io/?c=eAHSOq
i can include the part of code included in the notice if required.
Thank you

• This topic was modified 4 years, 11 months ago by hmisland.