It’s Good But

It’s good and can be made to work very simply and easily with just the Shortcode. I have tested it out on a couple of sites and the search calls up the relevant posts and pages, however, there is a site where nothing is found. And before you say deactivate other plugins, themes etc – this has been done over and over again. I’m now onto the theme creators.
But I wonder if I need to add the php function as well?