The Walsall Libraries server, for their online catalogue, seems to be down at the moment. I can't even get into their home page. I'll try again later but it seems possible that, when you use the History function, you're viewing an old page which is stored in the cache of your computer. When you click on any link from that page, your PC tries to access a new page from the Walsall library server which isn't responding. (i.e. it's possible that there's nothing wrong at your end of things. It's a fault with the library's server).
I'll try later and let you know whether I can access the catalogue.
Chris