My b2evolution Version: Not Entered

Hello,

I have version 3.3.3 installed. I just upgraded from 2.4.1.

I must be missing something because I had this same problem in the older version as well.

When I click on the "permalink" of the blog post it results in "page not found".

Likewise, if I click on one of my categories in the side bar - page not found.

In the SEO panel I have "Use extra-path: post title" selected.

What am I missing?

Thank you,
caryl