Product Search

Hi. Can someone please help. When the product search is used, the results are not displayed correctly. They come up in a strange list – https://britishcandyco.com/?s=cadbury I just can’t figure out what has gone wrong. The only thing I can think of is, I did at one point install the thumbnail regenerator but then decided to uninstall and delete my images and start again without using the plugin.

I would be greatful for any thoughts.