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 "http://viberchatbot.ga/.well-known/acme-challenge/letsdebug-test": dial tcp 141.147.63.84:80: connect: connection refused
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
@90ms: Experienced error: dial tcp 141.147.63.84:80: connect: connection refused
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 http://viberchatbot.ga/.well-known/acme-challenge/9wANLCplEncPLzQSWP8hWTeu1Fc1DMJ3kddPU-_H0nE: Connection refused