Cannot to login to my website's admin panel after changing http to https

[KangJL]

@boscout

still my site is showing that it is not secure .

You have SSL cert but you did not install it.
Please do so

How to install an SSL certificate

In order to get a padlock in the address bar in your website, you need to install an SSL certificate on your website. This article describes how to do that. If you would rather watch a video, scroll down to the bottom of this article. Installing an SSL certificate The first step to install an SSL certificate is of course to get the SSL certificate. You will need to get your SSL certificate from a certificate vendor of your choice. InfinityFree also provides free SSL certificates in the client …