deformation of the theme

Hello,
I would like to use this plugin is perfect (I tested). The problem is that it “distorts” my theme (including the slide). Could you please tell me how I should go about it (how to configure it properly, perhaps) so it does not affect the layout of the theme (my website here, but I had to remove the plugin, because of this change in the theme when it works)?
In advance, thank you.
Rosa.

https://wordpress.org/plugins/bwp-minify/