nextcloud.con20.xyz has an A (IPv4) record (80.162.33.206) but a request to this address over port 80 did not succeed. Your web server must have at least one working IPv4 or IPv6 address.
A timeout was experienced while communicating with nextcloud.con20.xyz/80.162.33.206: Get "http://nextcloud.con20.xyz/.well-known/acme-challenge/letsdebug-test": dial tcp 80.162.33.206:80: i/o timeout
Trace:
@0ms: Making a request to http://nextcloud.con20.xyz/.well-known/acme-challenge/letsdebug-test (using initial IP 80.162.33.206)
@0ms: Dialing 80.162.33.206
@10001ms: Experienced error: dial tcp 80.162.33.206:80: i/o timeout
A test authorization for nextcloud.con20.xyz to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
80.162.33.206: Fetching http://nextcloud.con20.xyz/.well-known/acme-challenge/bA9Bc9CuBIUQZ1KUpdV_An3TqF9hmoIXfFvTj3eFgl8: Timeout during connect (likely firewall problem)