Redirect admin 403 “Cheatin uh?” admin pages

Sounds like this is what you’re running into.

admin_page_access_denied may be the hook you want to use for this.

try

function dont_show_cheatin_page() {
    if ( current_user_can( 'do_not_allow' ) ) {
      wp_safe_redirect( admin_url()); // custom redirect instead of Cheatin 403 page
      exit;
    }
} 
add_action('admin_page_access_denied', 'dont_show_cheatin_page');