Did you restart the computer after re/installing python? I guess it should not be needed but who knows.
Try to remove/add some top well known search plugin and restart qbt and retry search.
https://github.com/qbittorrent/search-p ... ch-plugins
Then i would check qbt the tab with logs (Execution log?) what it shows (i would check all log lines for errors related to python/search/plugins and remove plugins that may be suspicious/outdated.
Beside installing latest python (not very likely to fix the issue), someone fixed similar issue like this:
What I did was, close qbittorrent completely(check in Task manager). Then I deleted the entire "engines" folder contained within the "nova3" folder from the qbittorrent install location. In my case in was in C:\Users\USERNAME\AppData\Local\qBittorrent\nova3. The folder "Appdata" might be hidden on your system, so google how to show hidden files. Then I opened qbittorent again, clicked on "Search". I had to reinstall all the search engines again, but it seems to have worked perfectly.
Feedback to what helped would always be good.
