I get the same warning. It says:
Your connection is not secure
The owner of 15.yourname.pay.clickbank.net has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website.
15.yourname.pay.clickbank.net uses an invalid security certificate.
The certificate is only valid for the following names:
*.clickbank.net, *.clickbank.com, *.hop.clickbank.net, *.accounts.clickbank.com, *.clkbank.com, *.pay.clickbank.net
Error code: SSL_ERROR_BAD_CERT_DOMAIN
Have you tried contacting ClickBank support?