Steps to reproduce:
- Open the special page GatherLists on testwiki: https://test.wikipedia.org/wiki/Special:GatherLists
- Click on "Erik Moeller (WMF)"'s or "Melamrawy (WMF)"'s or "Jalexander-WMF"'s list (or username, seems to doesn't matter)
Expected: The public list should be visible
Observed: I get an 404 error
(I'm not sure, if this is related to the fact, that these lists and users are all WMF staffs? The lists from @Yurik and @Jdlrobson works fine)