page not found

I have the following problem this appears in almost all the predefined pages for example the "userlogin" "thankyou" etc ... in many more, This is the error. "page not found" in several in the bar above I leave sample images. thanks :D

Hi, I have setup a new store recently with one one the theme from 3 AliDropship Themes. Everything seems working fine on my store except the Product Page ( Shop). I get an error - 404 Page not found. Please help me to fix this issue. Thank You