How to set up the sidebar
In this theme, we paid special attention to Sidebars for your biggest convenience and on multiple previous requests. We have two types of the sidebar: Now how it works.
1) Sidebars - Custom Post type which you build by means of Visual Composer and can insert into a page via the STM Sidebar Visual Composer Module.
2) Appearance - > Widgets - > Sidebars which you build by means of regular WordPress widgets and insert into a page by means of Widgetized Sidebar Visual Composer Module. So, in our posts, for example, we use Widgetized Sidebar - > Right Sidebar.
If you want to insert Custom Sidebar, you should use STM Sidebar Module - > Choose one of the pre-created ones.