Warning: require_once(includes/class-ultimate-blocks-constants.php): failed to open stream: No such file or directory in /var/www/vhosts/suedhang.ch/httpdocs/wp-content/plugins/ultimate-blocks/ultimate-blocks.php on line 24

Fatal error: require_once(): Failed opening required 'includes/class-ultimate-blocks-constants.php' (include_path='.:/usr/share/pear:/usr/share/php') in /var/www/vhosts/suedhang.ch/httpdocs/wp-content/plugins/ultimate-blocks/ultimate-blocks.php on line 24