Pages not displaying for users below Administrator

Everything was working fine and then this morning it just turned up 404 errors whenever I click on any of the page titles on the main page. The pages ARE there, I’ve viewed them from within the dashboard area, but for some reason the links aren’t working. I had just recently installed link2categories2 to restrict write access to the local business section…thought I’d deactivate it and see if it helps, it didn’t. I’ve went through all of my recent changes and can’t find a thing. If anyone can help me out here, I’d appreciate it.

https://nwcom-unity.ca

Thank you

Ray