ECB/QSA can't be downloaded - provider side error

Since many months (at least march 2020), ECB/QSA dataset is not properly downloaded. Download starts, then is stopped by ECB server.

The download URL is: https://sdw-wsrest.ecb.europa.eu/service/data/QSA/

TODO before closing this issue:

• answer to user in forum: https://forum.db.nomics.world/t/ecb-qsa-update-2019q4-data/367