I have installed the plugin and when trying to install another plugin, i get the following error message.

What can I do?

Warning: require_once(/var/www/vhosts/…/wp-content/plugins/rating-widget/freemius/includes/class-fs-logger.php): failed to open stream: No such file or directory in /var/www/vhosts/…/wp-content/plugins/rating-widget/freemius/require.php on line 13

Fatal error: require_once(): Failed opening required ‘/var/www/vhosts/…/wp-content/plugins/rating-widget/freemius/includes/class-fs-logger.php’ (include_path=’.:/opt/plesk/php/5.6/share/pear’) in /var/www/vhosts/…/wp-content/plugins/rating-widget/freemius/require.php on line 13