filelake.xyz has an A (IPv4) record (213.93.220.118) 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://filelake.xyz/.well-known/acme-challenge/letsdebug-test": EOF
Trace:
@0ms: Making a request to http://filelake.xyz/.well-known/acme-challenge/letsdebug-test (using initial IP 213.93.220.118)
@0ms: Dialing 213.93.220.118
@95ms: Experienced error: EOF