Page 2 on Blog is Broken Link

Hi everyone, I’m in need of some help again.

I am using White Gold theme and my blog is https://www.customportraitsonline.com. I have just noticed that when you scroll to the bottom of the main page and click on the “2” (to take you to the next page of posts) you get a page error 404b message.

Any ideas on how to fix this or where I should be looking in the code?

Thank you ??