Issues with subdomain redirection

Hi, so I have this issue but first let me explain: So I rent a dedicated server, where I have one of my domains as main one connected to my WHM setup, from where I then create cPanel accounts for clients, and for my own projects. So for one of my projects, I have installed wordpress and created a multisite network setup with the use of subdomain, however there is a slight issue with this, as although I can enter the dashboard (after setting up wildcard (*.example.com) for the domain I use for this project), when I click on visiting the site, I get redirected to my main domain I use for the server which is not even the domain I use for this multisite setup. If I create a page for instance, and that would be (blabla.example.com/page), then that shows normally, but without a subdirectory at the end I just get thrown to my server’s main domain. Any help would be much appreciated (also yesterday I was struggling for some time getiing curl 6 error when setting up the multisite which resulted in me figuring out I had to do the wildcard dns thing). Thanks. If any more details are necessary let me know! 🙂

http://popisxeiropoiimata.diy-workshop.gr/sample-page <== works…

The page I need help with: [log in to see the link]