Warning: require(/var/www/html/wp-content/plugins/wordfence/lib/wfVersionSupport.php): Failed to open stream: Cannot allocate memory in /var/www/html/wp-content/plugins/wordfence/waf/bootstrap.php on line 22

Fatal error: Uncaught Error: Failed opening required '/var/www/html/wp-content/plugins/wordfence/waf/../lib/wfVersionSupport.php' (include_path='.:/usr/local/lib/php') in /var/www/html/wp-content/plugins/wordfence/waf/bootstrap.php:22
Stack trace:
#0 /var/www/html/wordfence-waf.php(6): include_once()
#1 {main}
  thrown in /var/www/html/wp-content/plugins/wordfence/waf/bootstrap.php on line 22