I checked the configuration and everything looks fine. As you can see in this screenshot, the certificate is valid:
However, there are http links when accessing the site using https and that's why your site is not fully secure. Please open the
View Page Source in your browser to get the list of http links. For example, I found this one:
Mixed Content: The page at 'https://www.pakoutdoor.com/' was loaded over HTTPS, but requested an insecure stylesheet 'http://www.pakoutdoor.com/wp-content/plugins/html5-maps/static/css/map.css'. This request has been blocked; the content must be served over HTTPS.
I hope it helps