In the home page, clicking next page will lead to error

I made a website by using Anspress, and it is really powerful.

but I have trouble in setting permalink (actually i don’t know how to) , so I use default setting of linking.

In the home page, I display questions . And when I click next page, it will lead to error page .

Please tell me how to fix this. (also including how to set permalink in anspress )

My website is http://wen.sheshouxing.com/ .

Thanks a lot.