spl90.hosting.reg.ru has an A (IPv4) record (31.31.198.204) 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 spl90.hosting.reg.ru/31.31.198.204: Get "http://spl90.hosting.reg.ru/.well-known/acme-challenge/letsdebug-test": dial tcp 31.31.198.204:80: i/o timeout
Trace:
@0ms: Making a request to http://spl90.hosting.reg.ru/.well-known/acme-challenge/letsdebug-test (using initial IP 31.31.198.204)
@0ms: Dialing 31.31.198.204
@10001ms: Experienced error: dial tcp 31.31.198.204:80: i/o timeout