Warning: require_once(/var/www/html/public/wp-content/plugins/suremails/loader.php): Failed to open stream: No such file or directory in /var/www/html/public/wp-content/plugins/suremails/suremails.php on line 30

Fatal error: Uncaught Error: Failed opening required '/var/www/html/public/wp-content/plugins/suremails/loader.php' (include_path='.:/usr/local/lib/php') in /var/www/html/public/wp-content/plugins/suremails/suremails.php:30
Stack trace:
#0 /var/www/html/public/wp-settings.php(545): include_once()
#1 /var/www/html/wp-config.php(121): require_once('/var/www/html/p...')
#2 /var/www/html/public/wp-load.php(55): require_once('/var/www/html/w...')
#3 /var/www/html/public/wp-blog-header.php(13): require_once('/var/www/html/p...')
#4 /var/www/html/public/index.php(17): require('/var/www/html/p...')
#5 {main}
  thrown in /var/www/html/public/wp-content/plugins/suremails/suremails.php on line 30