https://wccftech.com/how-to/how-to-fix-windows-10-search-bugs/

Windows 10 updates are probably the biggest reason why people didn't want to leave their now-out-of-support Windows 7 machines. Time and again, some update arrives that just messes up some mundane and yet critical feature of the operating system, disrupting the workflow. As reported earlier, this time it was Windows 10 search pushing Windows 10 users to face their palms... or desks.

The problem is with Windows Search that turned up blank boxes for what appears to be a majority of Windows 10 users (full disclosure: I did not experience it on my device running version 1909). Microsoft acknowledged the Windows 10 search issue yesterday and has marked it resolved. However, several users are still reporting experiencing this issue.