Projects no longer linking to the projects page

When i click on the projects on the home page i just get an error where as in the past when i clicked on them they went through to a project page.

Help please

Site: here

Hello there,

Thank you for reaching out to us here.

The common problem that causes this issue is .htaccess file which handles permalink structure can’t instantly updated when new post type (like projects) detected. To first thing to do to fix this is by visiting the permalinks configuration in the Settings > Permalinks, and then just hit the Save Changes button.

If it fails, there might be permission issue with your .htaccess file. To verify, check it with your web hosting support.

Regards,
Kharis

Thankyou so much this solved my problem