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Hidden SSL cerificate


I have the following problem:

In the section "Certificates" in my GoDaddy account I read this message: No matching certificates. But when I check my site with Certificate Checker tool it appears that it has a certificate but there are errors:
1. Certificate Names - Hostname missmatch;
2. Heartbeat Extension - Enabled;
3.Strict-Transport-Security - Disabled.

With another SSL checker appears this message:

None of the common names in the certificate match the name that was entered. You may receive an error when accessing this site in a web browser.

How can I fix this?