Site Support as your last course of action to resolve the issue
Few days ago, as i published a new post on my site it indicates not secure so i asked the community how to fix it. Knowing it has something to do on my images set as http instead of https. So i took down all the images. Upon scanning all of my posts i got one that was posted a week ago has the same issue so i have do the same, to take down all the images and change it. But it didn't fixed the issue.
The community has been so HELPFUL to me of their suggestions. I installed SSL Insecure Content Fixer plugin and normally my server detects https. I checked my SSL Certificate and it's valid and SiteSSL(Https) is on. So,I spent checking my links and settings then i run the test to padlock but my SSL connection is error so my Certificate test failed.
Last issue, I noticed my permalink inside the wordpress is on http but the site is loading as https. (Make sure to check all of your permalink settings posts maybe it is on http instead of https.)
I coudn't find the issue so i sent a ticket to Site Support and just one minute they fixed the issue. Whew! Thank you WA community and Site Support!
Never give up learning.
Good day everyone.