Error in Application event log:
The start address sps3://nsppweb-sspt91 cannot be crawled.
Context: Application ‘Search_Service_Application’, Catalog ‘Portal_Content’
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. If the repository being crawled is a SharePoint repository, verify that the account you are using has “Full Read” permissions on the SharePoint Web Application being crawled. (0x80041205)
The search service account does not have “Retrieve People Data for Search Crawlers” permission in the User Profile Service Application.