Fatal error: Uncaught Error: Undefined constant "WP_PLUGIN_DIR" in /var/www/eintrachtpodcast/wp-content/plugins/quick-pagepost-redirect-plugin/updater/Puc/v4p10/Factory.php:169 Stack trace: #0 /var/www/eintrachtpodcast/wp-content/plugins/quick-pagepost-redirect-plugin/updater/Puc/v4p10/Factory.php(73): Puc_v4p10_Factory::isPluginFile() #1 /var/www/eintrachtpodcast/wp-content/plugins/quick-pagepost-redirect-plugin/page_post_redirect_plugin.php(38): Puc_v4p10_Factory::buildUpdateChecker() #2 {main} thrown in /var/www/eintrachtpodcast/wp-content/plugins/quick-pagepost-redirect-plugin/updater/Puc/v4p10/Factory.php on line 169