Mautic reverse proxy with Traefik

Traefik Traefik v2 (latest)
1

Hi,
I created a Docker instance composed of Mautic (Marketing Automation) with Traefik as Reverse Proxy.
However when I try to connect Mautic with Zapier, I can't do it.
I get the following message:

Connect_an_Account___Zapier_et_Mautic
Connect_an_Account___Zapier_et_Mautic976×750 36.8 KB

Someone might have an idea of the problem? Am I missing a configuration line? I have seen very little about Mautic with Traefik. Thanks for your help.

mauticdb:
    restart: always
    image: percona/percona-server:5.7
    container_name: mauticdb
    volumes:
      - mysql_data:/var/lib/mysql
    environment:
      - MYSQL_ROOT_PASSWORD=${MAUTIC_DB_PASSWORD}
    command:
      --character-set-server=utf8mb4 --collation-server=utf8mb4_general_ci
    networks:
      - web

  mautic:
    restart: always
    image: mautic/mautic:latest
    container_name: mautic
    links:
      - mauticdb:mysql
    depends_on:
      - mauticdb
    ports:
      - 127.0.0.1:8090:80
    volumes:
      - mautic_data:/var/www/html
    environment:
      - MAUTIC_DB_HOST=mauticdb
      - MYSQL_PORT_3306_TCP=3306
      - MAUTIC_DB_USER=root
      - MAUTIC_DB_PASSWORD=${MAUTIC_DB_PASSWORD}
      - MAUTIC_DB_NAME=mautic
      - MAUTIC_RUN_CRON_JOBS=true
      - PHP_INI_DATE_TIMEZONE=${GENERIC_TIMEZONE}
    networks:
      - web
    labels:
      - traefik.enable=true 
      # Routes
      - traefik.http.routers.mautic.rule=Host(`${MAUTIC_SUBDOMAIN}.${DOMAIN_NAME}`)
      - traefik.http.routers.mautic-secure.tls=true
      - traefik.http.routers.mautic.entrypoints=websecure
      - traefik.http.routers.mautic.tls.certresolver=mytlschallenge
      # Middlewares
      - traefik.http.middlewares.mautic.headers.SSLRedirect=true
      - traefik.http.middlewares.mautic.headers.contentTypeNosniff=true
      - traefik.http.middlewares.mautic.headers.SSLHost=${DOMAIN_NAME}
      - traefik.http.middlewares.mautic.headers.forceSTSHeader=true