I updated to Arch. 13 and some of my content (mainly casework) was not working properly, so I deleted it and decided to just re-download the files. Insert ribbon > Seek search bar leaves me with a blank page. I've tried queries: "casework" "ceiling fan" "furnace" "family" "lighting" and "wall."
I've tried getting through via Revit Architecture as well.
I'm in the middle of a design concept rendering for a client... so this caught me completely off-guard.
Not sure why your search box on the Insert Tab wont' work, but if you're in a hurry for content just go to the Autodesk Seek website.