Dashboard 404 after upgrading from v2

Traefik Traefik v3 (latest)
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1

I get error "404 page not found" after upgrading from traefik from v2.x.x to v3.x..
This error appears only when I'm trying to access dashboard but when I'm using it to access other containers it works fine.

docker-compose.yml

version: "3.9"
services:
  traefik:
    image: traefik:v3.3.0
    container_name: traefik
    networks:
      - proxy
    ports:
      - 80:80/tcp
      - 443:443/tcp
    volumes:
      - ./config/traefik.yml:/traefik.yml:ro
      - ./config/dynamic.yml:/dynamic.yml:ro
      - /docker/logs/traefik:/var/logs/traefik
      - ./acme.json:/acme.json
      - /var/run/docker.sock:/var/run/docker.sock
      - /etc/localtime:/etc/localtime:ro
    security_opt:
      - no-new-privileges:true
    environment:
      - CF_DNS_API_TOKEN=X
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.dashboard.rule=Host(`traefik.local.X`) && (PathPrefix(`/api`) || PathPrefix(`/dashboard`))"
      - "traefik.http.routers.traefik.entrypoints=websecure"
      - "traefik.http.routers.traefik.service=api@internal"
      - "traefik.http.routers.traefik.tls.certresolver=cloudflare"
      - "traefik.http.routers.traefik.tls=true"
      - "traefik.http.routers.traefik.tls.domains[0].main=local.X"
      - "traefik.http.routers.traefik.tls.domains[0].sans=*.local.X"
      - "traefik.http.routers.traefik.middlewares=auth@file,default@file"
    restart: always
networks:
  proxy:
    external: true

traefik.yml

global:
  checkNewVersion: false
  sendAnonymousUsage: false

api:
  dashboard: true
  debug: false
entryPoints:
  web:
    address: ":80"
    http:
      redirections:
        entrypoint:
          to: websecure
          scheme: https
  websecure:
    address: ":443"

serversTransport:
  insecureSkipVerify: true

providers:
  docker:
    endpoint: "unix:///var/run/docker.sock"
    exposedByDefault: false
    network: proxy
    watch: true
  file:
    filename: "dynamic.yml"
    watch: true

certificatesResolvers:
  cloudflare:
    acme:
      email: ""
      storage: "/acme.json"
      keyType: RSA4096
      dnsChallenge:
        provider: cloudflare
        resolvers:
          - "1.1.1.1:53"
          - "1.0.0.1:53"

log:
  level: "DEBUG"
  filePath: "/var/logs/traefik/traefik.log"
accessLog:
  filePath: "/var/logs/traefik/access.log"
  bufferingSize: 100

dynamic.yml

tls:
  options:
    default:
      minVersion: VersionTLS13
      sniStrict: true

http:
  middlewares:
    auth:
      basicAuth:
        users:
          - "x"
2

This seems wrong:

The "default" does not seem to be a declared middleware.

3

Removed "default@file". Still doesn't work

4

You should use the same router name for all labels:

5

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