Upgrade Keycloak

[Yu Ling Cheong]

I try to upgrade my Keycloak from version 6 to the latest version using docker-compose.
As the following unfortunately after run the docker-compose,after I click the login in Keycloak it show me "Internal Server Error":.

May I know what caused this?

keycloak:

    container_name: keycloak_c

    image: jboss/keycloak:latest

    environment:

      KEYCLOAK_USER: admin

      KEYCLOAK_PASSWORD: admin

      KEYCLOAK_DEFAULT_THEME: ABC

      KEYCLOAK_HTTP_PORT: 8080

      KEYCLOAK_HTTPS_PORT: ${KEYCLOAK_PORT}

      #KEYCLOAK_HOSTNAME: ${SERVER_HOSTNAME}

      PROXY_ADDRESS_FORWARDING: "true"

      DB_USER: keycloakdb

      DB_PASSWORD: ${KEYCLOAK_DB_PASSWORD}

      DB_DATABASE: keycloak

      DB_ADDR: pgkeycloak

      DB_VENDOR: postgres

      DB_SCHEMA: public

    ports:

      - "8080:8080"

      - "${KEYCLOAK_PORT}:8443"

    networks:

      - edulab

    depends_on:

      - pgkeycloak