Por favor, complete los campos del siguiente formulario para que podamos ayudarle de la mejor forma posible. Nota: debe proporcionar su nombre de dominio para obtener ayuda. Los nombres de dominio de los certificados emitidos se hacen públicos en los registros de Transparencia de Certificados (por ejemplo, https://crt.sh/?q=example.com), por lo que esconder aquí su nombre de dominio no sirve de nada, únicamente nos dificulta prestarle la ayuda solicitada.
Your browser sent a request that this server could not understand.
Reason: You're speaking plain HTTP to an SSL-enabled server port.
Instead use the HTTPS scheme to access this URL, please.
Do you need help with this? You probably mixed up some port number somewhere.
I share with you my configuration of etc/apache2/sites-available/000-default.conf and according to me here I have already configured so that the redirection to https is not mandatory
You can replace :80 with :443 on the first line, and this should work. (It won't make the validation work, tho. Validation needs port 80 in this case. You might also want to use the acme client included with apache)