Some thumbnails from DjVu files are not created. This happens on at least 2 files:
from file https://commons.wikimedia.org/wiki/File:Revue_des_Deux_Mondes_-_1843_-_tome_3.djvu
- and several pages for
https://commons.wikimedia.org/wiki/File:Kropotkine_%E2%80%94_Paroles_d%27un_R%C3%A9volt%C3%A9.djvu
https://fr.wikisource.org/wiki/Page:Kropotkine_%E2%80%94_Paroles_d%27un_R%C3%A9volt%C3%A9.djvu/158
https://fr.wikisource.org/wiki/Page:Kropotkine_%E2%80%94_Paroles_d%27un_R%C3%A9volt%C3%A9.djvu/186
https://fr.wikisource.org/wiki/Page:Kropotkine_%E2%80%94_Paroles_d%27un_R%C3%A9volt%C3%A9.djvu/205
Version: wmf-deployment
Severity: major