@blomig,
Please execute this SQL query in phpMyAdmin database manager SQL Tab. You can install phpMyAdmin plugin, or use your Hosting Service cPanel > phpMyAdmin Database Manager > Your website Database > SQL Tab:
CREATE TABLE `wp_wc_feedback_forms` (`id` int(11) NOT NULL AUTO_INCREMENT, `post_id` int(11) NOT NULL DEFAULT 0, `unique_id` VARCHAR(15) NOT NULL, `question` varchar(255) NOT NULL, `opened` TINYINT(4) UNSIGNED NOT NULL DEFAULT 0, `content` LONGTEXT NOT NULL, PRIMARY KEY (`id`), UNIQUE KEY `unique_id` (`unique_id`), KEY `post_id` (`post_id`));CREATE TABLE `wp_wc_users_rated` (`id` int(11) NOT NULL AUTO_INCREMENT, `post_id` int(11) NOT NULL DEFAULT 0, `user_id` int(11) NOT NULL DEFAULT 0, `user_ip` VARCHAR(32) NOT NULL DEFAULT '', `rating` int(11) NOT NULL, `date` INT(11) UNSIGNED NOT NULL DEFAULT 0, PRIMARY KEY (`id`), KEY `post_id` (`post_id`), KEY `user_id` (`user_id`));
Don't forget delete all kind of caches again (plugin cache, CDN, minifier, optimizer). And refresh you browser pressing Ctrl+F5 to reset browser cache too.