Cannot open zimbra in Google chrome and IE browser

I have installed Zimbra Collaboration Suite Open Source Edition 7.20, then if I open in Google Chrome browser I get error like this

Quote:

Invalid Server Certificate
You attempted to reach, but the server presented an invalid certificate.
You cannot proceed because the website operator has requested heightened security for this domain.

I try to reinstalled the certificate, but the result is same,,
help me please,

Regards