previous posts not working

When i scroll to the bottom of my blog page and click on previous posts link, i get a “page not found” error.

Im not sure how to fix this, any ideas?

My blog is at https://www.fintangphotography.com/blog and page 2 tries to hit
https://www.fintangphotography.com/blog/page/2/ but doesnt find it.

Thanks!