Not compatible with my wordpress

Your plugin is Not compatible with my latest wordpress…as showing by your plugin details page “Warning: This plugin has not been tested with your current version of WordPress.”
Please do the needful it is an awesome plugin I just don’t want to uninstall it.

https://mies-lawcollege.com/wp-admin/plugin-install.php?tab=plugin-information&plugin=ag-custom-admin&TB_iframe=true&width=600&height=550

The page I need help with: [log in to see the link]