having issue on shopping cart page

i have installed this plugin in my site its working absolutely fine, but one problem when i am going to shopping cart its treated that page and page not found see the title of the page it showing page not found although its working fine
see the cart page

see the mata title

also in theme its treated as page not found

can you tell me how can fix this issue that it will show the proper mata title please fix this issue as soon as possilbe