I use smart search on my site, and it's been working fine. Today, just heard that the search result page return "No results were found". The thing is: if I logged into admin (Live site), the search result page showed data, but if I logged out, the results were empty. The search on my staging site worked fine.
I've been trying to troubleshoot but couldn't. Don't know yet when the issue started. Things I've done and looked at: Visibility, and Security setting applied on the page and web part, re-built Search Index. Thanks for any input!
It looks like you have a permission issue. You probably have the smart search set up to filter out results for pages that users are not allowed to access
This checkbox indicates whether the web part filters the search results to exclude pages for which users do not have the "Read" permission.