[Drush] Cannot download modules and/or updates from drupal.org

Hello everybody, since a reinstallation of my dev-enviroment I can’t do any downloads with drush. All other drush features seems to be running fine. Here is the error message when I try to download the D8 module “dynamictagclouds”: [email protected]:/opt/webserver/lampstack-5.6.17-0/apache2/htdocs/phs_dev/dercheffe$ drush –verbose dl dynamictagclouds Executing: mysql[…]