Hi Ivo,
Thank you for buying our theme. We hope it will meet all your expectations! 🙂
Did you install Social Articles plugin ? You might need to set the right url in the Logged In menu.
Note that this plugin is no longer supported by its authors. So, we recommend you BuddyPress User Blog plugin. This premium plugin allows your members to create and manage their own posts from their BuddyPress profile. They can set the title, content, categories, tags, featured image and more. As an administrator, you have control over which fields your members are allowed to fill and whether or not posts have to be reviewed by an admin before being made public.
If you want to build a community site and give your users the opportunity to blog, this plugin is exactly what you need.
Cheers,