ERR_SSL_PROTOCOL_ERROR after adding another subdomain

[JuergenAuer]

@mcassar

Could you please guide me how I can give blogs its own certificate like the others?

Create an own default vHost.

@mcassar

AH00558: apache2: Could not reliably determine the server’s fully qualified domain name, using 127.0.0.1. Set the ‘ServerName’ directive globally to suppress this message

Looks like Certbot doesn't understand

@mcassar

default server blogs.stcatherines.eu (/etc/apache2/sites-enabled/blogs.stcatherines.eu.conf:10)
port 80 namevhost blogs.stcatherines.eu (/etc/apache2/sites-enabled/blogs.stcatherines.eu.conf:10)

that configuration. And compare it with your other vHosts.