I'm trying to delete https://commons.wikimedia.org/wiki/File:Literature_II,_Harutyun_Surkhatian.djvu but the file won't delete, instead it gives the error.
Error deleting file: An unknown error occurred in storage backend "local-multiwrite".
The file looks to be corrupt in some way, perhaps uploading has failed and left us with a file description page and a corrupt djvu file (the file being non functional is why it has been nominated for deletion).
The original file, as uploaded https://upload.wikimedia.org/wikipedia/commons/d/df/Literature_II%2C_Harutyun_Surkhatian.djvu returns a 502 Bad Gateway error when you try to download it, so it's not possible to download and re-upload.
This issue appears to have been present for at least the last month, the file was tagged for speedy deletion, couldn't be deleted and somehow was converted into a regular DR, where it sat unclosed for three+ weeks because nobody could manage to delete the file.
T75094 may be a related bug, so I've set the same tags and subscribers, but opened a new ticket as the error isn't exactly the same and the file type is different.