Pagination Not Working

Currently I have 101 items as per Stock Central screen, the Products per Page is set at 20, but I only can see 11 items and there is no pagination.

Therefore, I couldn’t see other items in Stock Central screen.

Kindly advise how to do in order to make pagination work so that I can check the other item at Stock Central screen

Thanks

The page I need help with: [log in to see the link]