What is a storefrontUrl parameter and why it has a wrong value (registration)?

[mkucmus]

During registration I get 400 error and similar output from API:

{
  "errors": [
    {
      "code": "VIOLATION::NO_SUCH_CHOICE_ERROR",
      "status": "400",
      "title": "Constraint violation error",
      "detail": "The value you selected is not a valid choice.",
      "source": {
        "pointer": "/storefrontUrl"
      },
      "meta": {
        "parameters": {
          "{{ value }}": "http://192.168.0.103:3000//",
          "{{ choices }}": "http://sw-6-production.local/"
        }
      }
    }
  ]
}

[mkucmus]

the storefrontUrl is an additional validation for registering purposes, and is being validated against the available domains registered in the specific sales channel in Shopware 6 admin panel.

Normally, the value for storefrontUrl parameter is taken from pwaHost config stored in shopware-pwa.config.js file.
That's why pwaHost should match the domain entries configured in Shopware 6 instance.