I'm an Oversighter (OS) on fr-wp (check). We used to access suppression logs on [[Special:Log/suppress]] (or [[Spécial:Journal/suppress]] in French); this is the link used both on en-wp and fr-wp pages about OS. On fr-wp, it gives the URL https://fr.wikipedia.org/wiki/Sp%C3%A9cial:Journal/suppress. But this URL doesn't work anymore. When using this link, I get the two following error messages, and no log at all is displayed:
- "Des problèmes sont survenus avec certaines de vos valeurs." (htmlform-invalid-input)
- "La valeur que vous avez spécifiée n’est pas une option valide." (htmlform-select-badoption)
Note: I accidentally found that when adding ?uselang=qqx at the end of the URL (https://fr.wikipedia.org/wiki/Sp%C3%A9cial:Journal/suppress?uselang=qqx) to see mediawiki interface messages titles, the log displayed correctly.
(I obviously can't produce screenshots.)