look for catalog/product listing in the user group and see if it is on.
You as admin can go to the pages that you are having issue with for the users, see whatt is called up in the URL and then look for it within the users group to see if it is turned on.
This is part of your learning how to manage your site - setting the functions for your user groups is entirely within your ability to manage. It's just a matter of figuring out what switches to turn on. After you worked on it a bit, your will have a better understanding of what you need to do.
Lee