ERR_SSL_PROTOCOL_ERROR when accessing website using HTTPS
I'm using Cloudflare DNS w/ Full SSL. The SSL certificates was installed using certbot as showed in this guide:
But when trying to access my website under https using Chrome:
This site can’t provide a secure connection Try running Windows Network Diagnostics. ERR_SSL_PROTOCOL_ERROR
I've checked the ufw port 443 are allowed.
In <VirtualHost *:443> the path to SSLCertificateFile and SSLCertificateKeyFile point to correct key created by certbot.
Please advise what might be the problem in this case?