Updating the Core Premium to V15.0.0 fails:
Enabling Maintenance mode…
Updating Plugin WPSSO Core Premium (1/1)
Downloading update from https://wpsso.com/extend/plugins/wpsso/download/?api_version=4.16.0&plugin_status=L%2A&plugin_version=15.4.3&version_filter=stable&user_direction=ltr&user_locale=en_US&tid=WPSSO-PP-7JD82249E5…
An error occurred while updating WPSSO Core Premium: Download failed. Forbidden
Disabling Maintenance mode…