I've gotten that message a lot at the end of installs, usually just is a time out connecting to Solr, if its your first install run you may need to Populate the Solr core "Populate Solr Managed Schema" in control panel than reindex, usualy better to do them individually.
for the MetadataAddress issue, make sure Sitecore Identity is working or disabled, and that all sites in the Connection strings have https, even if the site is not active.