After search pages won't work

I am having an issue with a site I have a built. When someone does a search for a product, the results seems to be stock on the first page, when clicking on subsequent pages nothing happens. The site is https://www.purpleowlboutique.com, if you were to do a search for “kickee pants” for example, when you try to move past page one you can’t. Could anyone give me any ideas as to what is happening and how I could fix it? I highly appreciate it.