Letsencrypt not working on one of many domains

Bom dia @niamniamniam. Vou responder em inglês já que as pessoas não gostam do uso de línguas estrangeiras nesse fórum.

Maybe there is something wrong or different about the DNS settings for that domain? People have suggested some DNS checking services in the earlier thread at

You could use these to discover if something is misconfigured in the DNS service for the Brazilian domains.