Fatal Error 2.7.8

Hi,

Just updated to 2.7.8 and now am getting fatal error

Fatal error: Uncaught Error: Class ‘Doofinder\WP\Log’ not found in /home/storm/sites/xxxxxx-xxxxxxx-uk/public/wp/wp-content/plugins/doofinder-for-woocommerce/doofinder-for-woocommerce.php:293 Stack trace: #0 /home/storm/sites/xxxxxx-xxxxxxx-uk/public/wp/wp-includes/class-wp-hook.php(324): Doofinder\WP\Doofinder_For_WordPress::upgrader_process_complete() #1 /home/storm/sites/xxxxxx-xxxxxxx-uk/public/wp/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() #2 /home/storm/sites/xxxxxx-xxxxxxx-uk/public/wp/wp-includes/plugin.php(517): WP_Hook->do_action() #3 /home/storm/sites/xxxxxx-xxxxxxx-uk/public/wp/wp-admin/includes/class-wp-upgrader.php(988): do_action() #4 /home/storm/sites/xxxxxx-xxxxxxx-uk/public/wp/wp-admin/includes/class-plugin-upgrader.php(137): WP_Upgrader->run() #5 /home/storm/sites/xxxxxx-xxxxxxx-uk/public/wp/wp-content/plugins/wordpress-seo-premium/src/addon-installer.php(351): Plugin_Upgrader->install() #6 /home/storm/sites/xxxxxx-xxxxxxx-uk/public/wp/wp-content/plugins/wordpress-seo-premium/src/addon-installe in /home/storm/sites/xxxxxx-xxxxxxx-uk/public/wp/wp-content/plugins/doofinder-for-woocommerce/doofinder-for-woocommerce.php on line 293

I tried rolling back the version but had the same issue.

Can you help?