after upgrading PHP version to 7.1 from 7.0 there was an error on my home page:
Sorry, we couldn't find that page
 operator not supported for strings
Does anyone has the same problem? The rest pages was fine, only Home.
Are you sure your are posting in product assigned forum?
What is your CMS version?
: WordPress 3.x
Link to installation
Have you edited any files? If yes tell us which ones.
Is this personal or client website?