ISPConfig - For multiple sites, Let's Encrypt is signing certificate with wrong name

I have successfully created and activated SSL/Let's Encrypt in ISPConfig for my first website which has domain name myfirstdomain.com under Websites. Then I create a a second website myseconddomain.com under Websites and activate SSL/Let's Encrypt. When I access myseconddomain.com, I get the following error in the browser:

NET::ERR_CERT_COMMON_NAME_INVALID.
This server could not prove that it is myseconddomain.com; its security certificate is from myfirstdomain.com. This may be caused by a misconfiguration or an attacker intercepting your connection.

Basically, the second domain is being signed with the first one. Any help?

 

No, the checkboxes ssl and letsencrypt have become unticked. I ticked them back and saved. When I check again, they appear ticked and then after another check, they become unticked again.

 

You are right. I tried to generate the certificates manually using `certbot --apache`. I got the following error:

An unexpected error occurred:
There were too many requests of a given type :: Error finalizing order :: too many certificates already issued for exact set of domains: myseconddomain dot com,www dot myseconddomain dot com:

I have exceeded letsencrypt limits for issuing certificates for this domain. I need to wait for some time and retry.

 

Noted!