Uses a non-existent resolver: myresolver

Traefik Traefik v2 (latest)
,
1

Unfortunately, I have not found a solution for the error in the forum.
I can't find a typo either.

providers:
  docker:
    exposedByDefault: false
    endpoint: "unix:///var/run/docker.sock"
certificatesResolvers:
  myresolver:
    acme:
      email: "webmaster@xxx.de"
      storage: "/etc/traefik/ACME/acme.json"
      dnsChallenge:
         provider: "dode"
         resolvers: ["95.130.22.130:53"]
         delayBeforeCheck: 20
entryPoints:
  web:
    address: :80
    http:
      redirections:
        entryPoint:
          to: websecure
          scheme: https
          permanent: true
  websecure:
    address: :443
    http:
      tls:
        domains:
        - main: "xxx.de"
        certResolver: myresolver
log:
  level: debug
api:
  dashboard: true
  insecure: true

time="2021-05-26T10:57:14+02:00" level=error msg="the router websecure-traefik@docker uses a non-existent resolver: myresolver"

Does one of you have an idea where it could be?