Fatal error: Uncaught Error: Undefined constant "CON_404_PAGE" in /var/www/html/user/plugins/404-redirect/plugin.php:19
Stack trace:
#0 /var/www/html/includes/functions-plugins.php(232): conan_setheader_404(Array)
#1 /var/www/html/includes/functions-plugins.php(282): yourls_apply_filter('redirect_keywor...', Array, true)
#2 /var/www/html/yourls-loader.php(66): yourls_do_action('redirect_keywor...', 'sakspapirer')
#3 {main}
thrown in /var/www/html/user/plugins/404-redirect/plugin.php on line 19