So I've checked the back-end.
I've opened the “Website Search” and tested, it works for me. I've typed in “home”, “cart” and the results were there. The title is there, but it's not visible because you set the title font to white and the default background image is white as well: https://i.imgur.com/yoy4d7k.png
If you set the “Result Content Background” to some other color on the Theme Options -> Isotopic results tab to something else than white, then it may also help: https://i.imgur.com/MYdthEB.pngBest,
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