"occ config:app:get social address" is empty NC 19.0.2+Social app 0.3.1

[Sanook]

occ config:app:get social address

According to https://github.com/nextcloud/social/issues/294#issuecomment-450990361 it should deliver the social address but it is empty.

What’s going wrong there?

occ social:check:install

- 0 invalid followers removed
- 0 invalid notes removed

- Your current configuration:
{
    "cloud_url": "https:\/\/domain.xx",
    "social_url": "https:\/\/domain.xx\/apps\/social\/",
    "social_address": "",
    "service": 1,
    "max_size": 10,
    "access_type": "all_but",
    "access_list": "[]"
}