For all images in https://commons.wikimedia.org/wiki/Category:Cultural_heritage_monuments_in_Sakhnovschyna_Raion it is impossible to create thumbnails.
I get: "Error generating thumbnail
Error creating thumbnail: Unable to save thumbnail to destination"
Purging does not help.
Version: unspecified
Severity: normal
URL: https://commons.wikimedia.org/wiki/Category:Cultural_heritage_monuments_in_Sakhnovschyna_Raion