If you get a 404 error page when you try to view a project, then you have to try a few things in order to fix this problem.

Please, go to “Settings > Permalinks” of your WordPress admin page and save your permalinks without making any changes. If this doesn’t fix the problem, please try to set “Custom Structure” to:

/%category%/%postname%/

and save the permalinks again. The problem should be fixed now.