Since activating membership I get "page not found errors".

Since activating membership I get "page not found errors". I have permalinks set to /%category%/%postname%/ and activated membership. I vaguely remember having this issue with a previous activation and was advised to set permalinks to default, log out and log back in and set permalinks to /%date%/%postname%/, which I have done. It still will not load and I get an "error page not found". Any ideas on how to fix it?
This is the result I want ....com.au/program-view/beginner-exercise-program/

Many thanks
Suzie