Failed to execute before state hook (state: passcode_confirmation)

[vdevc]

Hi, I setup a new docker container locally and configured an nginx service to act as a proxy.
The service starts successfully and if I query the public configuration endpoint I successfully get

{
    "password": {
        "enabled": true,
        "min_password_length": 8
    },
    "emails": {
        "require_verification": true,
        "max_num_of_addresses": 3
    },
    "providers": null,
    "account": {
        "allow_deletion": true,
        "allow_signup": true
    },
    "use_enterprise": false
}

My objective is to learn the Flows API to understand how it works.
I started with registration of a user. These are the steps I am executing using Postman:

1. Send a POST request with an empty body to /registration. This request returns 200 OK and contains a single action with name register_client_capabilities
2. I then send another POST request to /registration?action=register_client_capabilities@{flowId}. This request returns 200 OK and a body with a single action with name register_login_identifier
3. I then send a third POST request to /registration?action=register_login_identifier@{flowId}. This request takes 10 seconds to complete with 500 Internal Server Error. The body I am sending is:

{
    "input_data": {
        "email": "{myemail}"
    },
    "csrf_token": "{csrfToken}"
}

I looked into the container logs and found this :

{
    "level":"info",
    "time_unix":"1758274920",
    "id":"DHJgefzUycGoFCKEVElGWLzWcdwaHDIK",
    "remote_ip":"x.x.x.x",
    "host":"auth.myserver.com",
    "method":"POST",
    "uri":"/registration?action=register_login_identifier@b7cac088-f80e-49d3-b06b-ad5308cae444",
    "user_agent":"PostmanRuntime/7.46.1",
    "status":500,
    "referer":"",
    "error":"technical_error",
    "error_internal":"the action failed to handle the request: failed to execute before state hook (state: passcode_confirmation): passcode service failed: dial tcp 1.179.115.1:2500: i/o timeout",
    "time":"2025-09-19T09:42:00.817762703Z"
}

What I am doing wrong?