How do I resolve this certificate error while I access my website?

I have a website built with Drupal and when I access via mac os chrome browser, I get the attached error. Also when I browser mobile devices the attached error comes.  What should I do to fix this error? I have installed SSL for the domain for security.
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Loganathan NatarajanLAMP DeveloperAsked:
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in order to use SSL you have to get an SSL certificate and install on your web site.

here is a tutorial how to do it.

Note that there some free alternative especially if you need it for testing or non-production environmemt.

A paid certificate cost around $5 for year.
Loganathan NatarajanLAMP DeveloperAuthor Commented:
FYI, I have already installed / configured SSL certificate to the website.  Live https URL
Dave BaldwinFixer of ProblemsCommented:
You have the normal  SSL/TLS certificate installed and working.  But for some reason, your site is also asking for a 'personal' certificate to identify the user.  This isn't normal unless you are trying to do a 'secure login' which I did not see.  I know what it is but I don't know where to tell you to look for it.

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Loganathan NatarajanLAMP DeveloperAuthor Commented:
Okay, How do I fix this? Is it SSL issue or server or website related issue?
Dave BaldwinFixer of ProblemsCommented:
I don't really know because I don't know how to set that up in the first place.  You have done something in Addition to installing a 'regular' TLS certificate.  I'd start by looking at the SSL/TLS setup.
Loganathan NatarajanLAMP DeveloperAuthor Commented:
It helped to figure out on SSL side
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