[Plugin: NextGEN Gallery] fatal error next gen gallery

Hello i updated the next gen gallery and get this fatal error while trying to activate the plugin

Warning: require_once(/srv/www/vhosts/klarlack.at/httpdocs/wp-content/plugins/nextgen-gallery/widgets/widgets.php): failed to open stream: No such file or directory in /srv/www/vhosts/klarlack.at/httpdocs/wp-content/plugins/nextgen-gallery/nggallery.php on line 253 Fatal error: require_once(): Failed opening required ‘/srv/www/vhosts/klarlack.at/httpdocs/wp-content/plugins/nextgen-gallery/widgets/widgets.php’ (include_path=’.:/usr/share/php5:/usr/share/php5/PEAR’) in /srv/www/vhosts/klarlack.at/httpdocs/wp-content/plugins/nextgen-gallery/nggallery.php on line 253

https://www.ads-software.com/extend/plugins/nextgen-gallery/