https://www.collaborationpro.com/share-point-2013-access-is-denied-verify-that-either-the-default-content-access-account-has-access-to-this-repository-or-add-a-crawl-rule-to-crawl-this-repository/
SharePoint 2013 - Access is denied. Verify that either the Default Content Access Account has access to this repository, or add a crawl rule to crawl this repository.