expressions

Hello! Recently i saw the expressions doesnt update in real time. Problem cache with litespeed or bug?

If you view https://gtmetrix.com/reports/goblintimes.com/E21rBhwL you will see under the YSlow tab that I have 2 F's and 1 E rating. The Add Expires Header is my concern and if you click the box it will drop down showing you what the issue is. I have added mod_expires to my .htaccess file but it...