Varnish Server
Specify the IP address of your varnish instance. If you do not know the ip address, you can ask your hosting provider on what to set here.
Fatal error: Uncaught Error: Call to undefined function get_option() in /home/handllu1/public_html/redboys/plugins/wp-fastest-cache/templates/varnish.php:29
Stack trace:
#0 {main}
thrown in /home/handllu1/public_html/redboys/plugins/wp-fastest-cache/templates/varnish.php on line 29