https://toolserver.org/~daniel/WikiSense/CommonSense.php?%s is called by imagerecat.py. But toolserver.org is down since years now.
Or better it is broken on this as the WikiSense project does not work anymore
There is one remaining action for this script is -onlyfilter to remove some categories. I propose to archive this script and move the remaining functionality to another script.
Don't found a corresponding script in our framework dealing with image categories
Change 435661 had a related patch set uploaded (by Xqt; owner: Xqt):
[pywikibot/core@master] [WIP] Rewrite imagerecat.py