Projects no longer linking to the individual projects page

The links of my projects are not working like they have in the past. I get an error page “Oops! That page can’t be found”. Please help. Here is my page

Hello there,

Please follow this tutorial. If it fails, there might be file permissions issue with your .htaccess file which handle permalink rewrite structure; check it with your web hosting support department.

Regards,
Kharis