viberchatbot.ga has an A (IPv4) record (141.147.63.84) 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.
Get "https://viberchatbot.ga/.well-known/acme-challenge/letsdebug-test": dial tcp 141.147.63.84:443: connect: no route to host
Trace:
@0ms: Making a request to http://viberchatbot.ga/.well-known/acme-challenge/letsdebug-test (using initial IP 141.147.63.84)
@0ms: Dialing 141.147.63.84
@183ms: Server response: HTTP 301 Moved Permanently
@183ms: Received redirect to https://viberchatbot.ga/.well-known/acme-challenge/letsdebug-test
@183ms: Dialing 141.147.63.84
@270ms: Experienced error: dial tcp 141.147.63.84:443: connect: no route to host
A test authorization for viberchatbot.ga to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
141.147.63.84: Fetching https://viberchatbot.ga/.well-known/acme-challenge/U49-ws7tKXbTX-WOjbB3V7EDJsWz6fL2sOXNtFvIueY: Error getting validation data