additionally, that looks like an old version of the script, the current one (2018) is here (i think the link on boards page is old and this thread is tl;dr)
https://github.com/acdean/kilxor/blob/master/kilxor.user.js
the images suggest a different problem, perhaps (uri not listed?), but try this first
― koogs, Thursday, 12 January 2023 11:59 (three weeks ago) link