Accessing Admin Console stucks in "Loading the admin console" Screen

Configuring the server
1

hi all - sorry for asking, but I am pretty new with keycloak.

i setup the start-dev yesterday easily and it works pretty well, so i thought to do today my prod environment. But everytime I try to open the admin-console “/admin/master/console/” it stucks in “Loading the admin console”.

From browser I can see:
“Uncaught (in promise) Object { error: “Timeout when waiting for 3rd party check iframe message.” }”

My config:

cat Dockerfile:

FROM quay.io/keycloak/keycloak:latest as builder

ENV KC_HEALTH_ENABLED=true
ENV KC_METRICS_ENABLED=true
ENV KC_FEATURES=token-exchange
ENV KC_DB=postgres

# Install custom providers
RUN curl -sL https://github.com/aerogear/keycloak-metrics-spi/releases/download/2.5.3/keycloak-metrics-spi-2.5.3.jar -o /opt/keycloak/providers/keycloak-metrics-spi-2.5.3.jar
RUN /opt/keycloak/bin/kc.sh build

FROM quay.io/keycloak/keycloak:latest
COPY --from=builder /opt/keycloak/ /opt/keycloak/
WORKDIR /opt/keycloak

# for demonstration purposes only, please make sure to use proper certificates in production instead
ARG CERT="certificate.crt"
COPY $CERT /opt/keycloak/
RUN keytool -importcert -file $CERT -alias $CERT -storepass password -keystore conf/server.keystore -noprompt

# change these values to point to a running postgres instance
ENV KC_DB_URL=jdbc:postgresql://db:5432/keycloak
ENV KC_DB_USERNAME=keycloak
ENV KC_DB_PASSWORD=keycloak
ENV KC_DB_SCHEMA=public
ENV KC_HOSTNAME=localhost

ENTRYPOINT ["/opt/keycloak/bin/kc.sh"]

cat docker-compose.yml

version: '3.8'

services:
  db:
    image: postgres
    restart: always
    environment:
      - POSTGRES_USER=keycloak
      - POSTGRES_PASSWORD=keycloak
    volumes:
      - db:/var/lib/postgresql/data
    container_name: keycloak_db

  keycloak:
    build:
      context: .
      dockerfile: Dockerfile
    depends_on:
      - db
    environment:
      KEYCLOAK_ADMIN: admin
      KEYCLOAK_ADMIN_PASSWORD: admin
    volumes:
      - /etc/ssl/auth.crt:/etc/ssl/auth.crt
      - /etc/ssl/auth.key:/etc/ssl/auth.key
    ports:
      - 8080:8080
      - 8443:8443
    container_name: keycloak_server
    command: >-
      start --optimized --db-url-host db --db-username keycloak --db-password keycloak \
      --http-enabled true --https-certificate-file /etc/ssl/auth.crt --https-certificate-key-file /etc/ssl/auth.key \
      --hostname-strict false

volumes:
  db:
    driver: local