Error after Update

Hello there,

since the last update, I get the following error:

Warning: require_once(/kunden/wp-content/plugins/nextgen-gallery/pope/lib/autoload.php): failed to open stream: No such file or directory in /kunden/wp-content/plugins/nextgen-gallery/nggallery.php on line 217

Fatal error: require_once(): Failed opening required ‘/kunden/wp-content/plugins/nextgen-gallery/pope/lib/autoload.php’ (include_path=’.:/usr/local/lib/php’) in /kunden/wp-content/plugins/nextgen-gallery/nggallery.php on line 217

Fatal error: Call to undefined function is_user_logged_in() in /kunden/wp-content/plugins/wp-statistics/includes/classes/hits.class.php on line 253

I have the plugin first disabled and played a backup back. Where does this error?

Best regards

https://ww.wp.xz.cn/plugins/nextgen-gallery/