After change to HTTPS indicate Site Not Secure

[gnrx]

Hi,
A few days ago, I change my site to https.
I made the changes in admincp-options-site name
Also, in templates with http to https
Also, I add in my public_html directory (I have a vbadvanced) and in my forum directory, in .httacess this code:

RewriteCond %{HTTPS} !=on
RewriteCond %{REQUEST_URI} !^/[0-9]+\..+\.cpaneldcv$
RewriteCond %{REQUEST_URI} !^/[A-F0-9]{32}\.txt(?:\ Comodo\ DCV)?$
RewriteRule .* https://%{HTTP_HOST}%{REQUEST_URI} [R=301,L]

The sewcond and third line are automatically add by server.

Well, access with https but also chrome, like firefox like chromium indicate that, my syte are not secure.

I search and search, but I don't view how are the problem or the issue for this.

Thanks in advanced.