Links to pages and posts not working (404 error)

Clicking on the links to pages and posts on my homepage (www.dudhsagar-goa.info) generates 404 errors (eg https://www.dudhsagar-goa.info/dudhsagar-falls). I have checked in the dashboard, the pages/posts are visible, and the links also seem to be correct. Any ideas what may be the issue?

PS. I’m running another WP-site (www.dudhsagarplantation.com) on the same server which is working fine…