[Theme: Forever child theme] Sidebar links to front page

Hi.
My website is https://www.restaurantcritic.eu, and I use a child theme of Forever.
My problem is that when I press a link on the sidebar on the right, the links don’t go to that post or the section called “news” (which is also at the top menu) but to the front page instead. Also, when I go to the section called “news”, the posts link to the front page instead of the post.
Does anybody know how to fix this? I could imagine it’s a fairly simple fix – I just don’t know as I’m not so savvy on web design.
Thanks for your help.