Error – Search has encountered a problem that prevents results from being returned. If the issue persists, please contact your administrator.

After searching in the internet, found this article helpful –

“http://moresharepoints.blogspot.in/2015/07/search-has-encountered-problem-that.html”;

Ran below commands to check if the search index partition is degraded on the search.

$searchApp= Get-SPEnterpriseSearchServiceApplication

Get-SPEnterpriseSearchStatus –SearchApplication $searchApp[0].Name

 

And found that Search index partition is degraded.

Then reset the index on the central admin

After Index reset and the full crawl, search started working perfectly.

Thank you Purna for saving my day…

参考网站：

https://learnwithshreedevitalad.wordpress.com/2017/05/30/search-has-encountered-a-problem-that-prevents-results-from-being-returned-if-the-issue-persists-please-contact-your-administrator/