RSA certificate configured for mydomain:443 does NOT include an ID which matches the server name

Hi,

I am trying to install Lets Encrypt SSL’s on all the sites in my VPS, using a single IP address. They all work as expected however the Apache error logs are showing:

RSA certificate configured for mydomain:443 does NOT include an ID which matches the server name

On all sites. Am I missing something? Any help would be appreciated.