Https shows 404, site available at http

UCS - Univention Corporate Server
1

Hello - Subdomain shows locked icon and is secure, Lets Encypt says is valid and site checks as valid at SSL checking sites…?
is something like

    <Directory /var/www/html>
        Options Indexes FollowSymLinks MultiViews
        AllowOverride All
        Order allow,deny
        allow from all
                Require all granted
    </Directory>

needed in htaccess ?