doplnkyprokaravany.cz.nahled.blueghost.cz has an AAAA (IPv6) record (2a00:1ed0:95::b) but a test request to this address over port 80 did not succeed. Your web server must have at least one working IPv4 or IPv6 address. You should either ensure that validation requests to this domain succeed over IPv6, or remove its AAAA record.
A timeout was experienced while communicating with doplnkyprokaravany.cz.nahled.blueghost.cz/2a00:1ed0:95::b: Get http://doplnkyprokaravany.cz.nahled.blueghost.cz/.well-known/acme-challenge/letsdebug-test: dial tcp [2a00:1ed0:95::b]:80: i/o timeout
Trace:
@0ms: Making a request to http://doplnkyprokaravany.cz.nahled.blueghost.cz/.well-known/acme-challenge/letsdebug-test (using initial IP 2a00:1ed0:95::b)
@0ms: Dialing 2a00:1ed0:95::b
@10000ms: Experienced error: dial tcp [2a00:1ed0:95::b]:80: i/o timeout
doplnkyprokaravany.cz.nahled.blueghost.cz has an A (IPv4) record (185.64.216.245) 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 doplnkyprokaravany.cz.nahled.blueghost.cz/185.64.216.245: Get http://www.doplnkyprokaravany.cz.nahled.blueghost.cz/.well-known/acme-challenge/letsdebug-test: dial tcp [2a00:1ed0:95::b]:80: i/o timeout
Trace:
@0ms: Making a request to http://doplnkyprokaravany.cz.nahled.blueghost.cz/.well-known/acme-challenge/letsdebug-test (using initial IP 185.64.216.245)
@0ms: Dialing 185.64.216.245
@213ms: Server response: HTTP 301 Moved Permanently
@213ms: Received redirect to http://www.doplnkyprokaravany.cz.nahled.blueghost.cz/.well-known/acme-challenge/letsdebug-test
@1739ms: Dialing 2a00:1ed0:95::b
@10000ms: Experienced error: dial tcp [2a00:1ed0:95::b]:80: i/o timeout
A test authorization for doplnkyprokaravany.cz.nahled.blueghost.cz to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
Fetching http://www.doplnkyprokaravany.cz.nahled.blueghost.cz/.well-known/acme-challenge/C-q1gmWF8UTDeQyTvX22XXC-FesvcA2K_GXn9rh9rxA: Error getting validation data