Catch gallery plugin not responsive

Hi, I am using the catch gallery plugin for my images and portfolios. The tiled mosaic (and thumbnail grid) are not responsive at all on any screen size other than desktop. We can read : "The plugin carries a completely responsive design and your galleries will look appealing from any device." and "Responsive Design Catch Gallery comes with a responsive design, which means, your galleries will look beautiful on all devices." I am sorry but this is not the case on my website and not even on your demo websites. I have made some CSS codes to tweak the thumbnail grids to look like responsive on my portfolio but this is pretty tricky and I cannot do the same with the tiled mosaic option...! Please provide me a solution to get the full potential of the pro theme I bought from you. Thank you in advance ! My website : https://bastienchilloux.com/24-heures-du-mans/