wordpress page crashed after I upgraded to latest verson of woocommerce

Hello. My wordpress page crashed after I upgraded to latest verson of woocommerce. Have read a little on the forum but not found any answer … please help !!

Warning: include_once(abstracts/abstract-wc-widget.php): failed to open stream: No such file or directory in /customers/a/b/2/dykkerlappen.no/httpd.www/test/wp-content/plugins/woocommerce/includes/wc-widget-functions.php on line 18 Warning: include_once(): Failed opening ‘abstracts/abstract-wc-widget.php’ for inclusion (include_path=’.:/usr/share/php’) in /customers/a/b/2/dykkerlappen.no/httpd.www/test/wp-content/plugins/woocommerce/includes/wc-widget-functions.php on line 18 Fatal error: Class ‘WC_Widget’ not found in /customers/a/b/2/dykkerlappen.no/httpd.www/test/wp-content/plugins/woocommerce/includes/widgets/class-wc-widget-cart.php on line 18