We just upgraded our SXA from 1.7 to 1.8.1 and when we finished updating it, the add renderings window does not display the sections of the renderings.
I know this has been asked before, but it appears that it doesn't have an answer yet.
I see such behaviour for the first time. I would check:
/sitecore/media library/Base Themes/Editing Theme
)Few more things to mention. Toolbox sections depend on the parent item where the rendering is located:
Items under Available Renderings are just to group allowed renderings. To make managing of allowed renderings easier bu putting them into logical groups. E.g.: All Context renderings which are allowed are here:
/sitecore/system/Settings/Foundation/Experience Accelerator/Upgrade/Current
and type1700
in "Version". Then run the upgrade scripts it prompts you for.