Traefik acme certificate Untrusted

Traefik Traefik v2 (latest)
1

traefik acme certificate Untrusted
my toml is like this

[certificatesResolvers.sample.acme]
  email = "myEmail@cdds.com"
  storage = "acme.json"
  [certificatesResolvers.sample.acme.httpChallenge]
    entryPoint = "http"
2

Could you please provide some more information? Something along these lines would be useful.