Links not showing on my blog

As you can see here on my wordpress blog: https://www.jakobsenwebsolutions.dk/blog/ No links are showing to my posts. What code do i need to make WordPress link to my posts and in what file do i have to put the code in?

The theme u can see in the link is created by myself. But i don’t know how to fix this isssue.

All help is really appreciated.

Kind regards.
Simon