No connection could be made because the target machine actively refused it

Hello, i am running Pydio on docker with reverse proxy from 8080 to https://fqdn

this is my docker-compose alternative file which my saas uses it to covert to docker-compose file

captainVersion: 4
services:
    # Pydio
    $$cap_appname:
        image: pydio/cells:$$cap_pydio_version
        environment:
            CELLS_LOG_LEVEL: 'production'
            CELLS_BIND: ':8080'
            CELLS_NO_TLS: '1'
            CELLS_EXTERNAL: https://$$cap_appname.$$cap_root_domain
        volumes:
            - $$cap_appname-data:/var/cells/data
            - $$cap_appname-cellsdir:/var/cells
        caproverExtra:
            containerHttpPort: '8080'
    # MariaDB
    $$cap_appname-mariadb:
        image: mariadb:$$cap_mariadb_version
        environment:
            MYSQL_RANDOM_ROOT_PASSWORD: '1'
            MYSQL_DATABASE: $$cap_mariadb-db
            MYSQL_USER: $$cap_mariadb-user
            MYSQL_PASSWORD: $$cap_mariadb-pass
        volumes:
            - $$cap_appname-mariadb-data:/var/lib/mysql
        caproverExtra:
            notExposeAsWebApp: 'true'
caproverOneClickApp:
    variables:
        - id: $$cap_pydio_version
          label: Pydio Version
          defaultValue: '2.2.8'
          description: Checkout their docker page for the valid tags https://hub.docker.com/r/pydio/cells/tags
          validRegex: /^([^\s^\/])+$/
        - id: $$cap_mariadb_version
          label: MariaDB Version
          defaultValue: '10.6.1'
          description: Checkout their docker page for the valid tags https://hub.docker.com/r/library/mariadb/tags/
          validRegex: /^([^\s^\/])+$/
        - id: $$cap_mariadb-db
          label: MariaDB Database
          description: Database name for Pydio
          defaultValue: 'pydio'
        - id: $$cap_mariadb-user
          label: MariaDB User
          description: Database User for Pydio
          defaultValue: 'pydio'
        - id: $$cap_mariadb-pass
          label: MariaDB database user password
          description: Super secret database user password
    instructions:
        start: >-
            Pydio Cells is the nextgen file sharing platform for organizations. It is a full rewrite of the Pydio project using the Go language following a microservice architecture.
        end: >-
            Aaaand you're done! 😄
            Your service is available at https://$$cap_appname.$$cap_root_domain
            Don't forget to enable HTTPS !
    displayName: ''
    isOfficial: true
    baseUrl: https://pydio.com/
    description: Privacy-conscious file sharing platform that connects all your teams in one place.
    documentation: Taken from https://hub.docker.com/r/pydio/cells

its working fine
now i installed the Cells sync client

connected my account
but when i try to select a folder path, i get the following error

all SubConns are in TransientFailure, latest connection error: connection error: desc = "transport: Error while dialing dial tcp 135.**.**.36:39793: connectex: No connection could be made because the target machine actively refused it."

i thought it was a port issue, so i opened port binded port 39793:39793
but then pydio wont work

How can fix this issue ?