I am getting this message from Joomla (3.6):
"Update: Could not open update site #25 "Community Builder Package Update Site", URL:
update.joomlapolis.net/versions/pkg-communitybuilder-list.xml
", what is wrong and can I just download the new version and upload?
That's rather strange. I can access fine that URL. If your site can't access it, maybe its server needs updated root SSL certificates ? We are using AWS Cloudfront CDN to deliver as fast and effective as possible the update XML files, and their standard SSL certificates. So maybe either your server has an outgoing firewall or its root certificates are not configured properly ? Would love to know that the problem was.
Otherwise you can go to Downloads on our site and download the latest Community Builder zip file and upload it via file upload Joomla installer to update.