Inpsyde\MultilingualPress\Installation\SystemChecker::check_plugin_activation PHP Метод

    private function check_plugin_activation()
    {
        $plugin_file_path = wp_normalize_path(realpath($this->plugin_properties->plugin_file_path()));
        foreach (wp_get_active_network_plugins() as $plugin) {
            if ($plugin_file_path === wp_normalize_path(realpath($plugin))) {
                return;
            }
        }
        /* translators: %s: link to network plugin screen */
        $message = __('This plugin must be activated for the network. Please use the <a href="%s">network plugin administration</a>.', 'multilingual-press');
        $this->errors[] = sprintf($message, esc_url(network_admin_url('plugins.php')));
    }