This theme have pleanty of issues. even the issues are showing in their demo.
Demo url: http://demo.saharathemes.com/magento2/sahara_fashion234/germany
In main menu bar, click on accessories, it wont have link. It is a category and it should have link.
After installing the theme the same is happening for us. whenever we are adding new category to the menu it wont show the link.
There are many other issues as well. I highlighted one because its showing in their theme demo.