Let's Debug

Test result for portalis.caa.cz using http-01

Error
portalis.caa.cz has an A (IPv4) record (193.86.115.73) 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 portalis.caa.cz/193.86.115.73: Get "http://portalis.caa.cz/.well-known/acme-challenge/letsdebug-test": dial tcp 193.86.115.73:80: i/o timeout

Trace:
@0ms: Making a request to http://portalis.caa.cz/.well-known/acme-challenge/letsdebug-test (using initial IP 193.86.115.73)
@0ms: Dialing 193.86.115.73
@10001ms: Experienced error: dial tcp 193.86.115.73:80: i/o timeout
A test authorization for portalis.caa.cz to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
193.86.115.73: Fetching http://portalis.caa.cz/.well-known/acme-challenge/IC94eq5Foi13YrdnvD_R-8E5oWCup6YYG1AOyakXuVw: Timeout during connect (likely firewall problem)

Submitted Apr 25 16:49:44 2022. Sat in queue for 2ms. Completed in 23s. Show verbose information.