@Languageseeker Can you provide more details on exactly how you are getting this error? Perhaps you can provide steps to reproduce it. Thanks!

If you look at the job queue it is mostly failures. https://ia-upload.toolforge.org/ Something major is going on.

Now, it just fails silently when trying to add a DJVU from the original jp2

This is the failed file https://archive.org/details/englishwomaninan00elli . There is no original DJVU and the jp2 files are in a tar.

Steps to reproduce

1. Go to https://ia-upload.toolforge.org/
2. ID of the file on Internet Archive: scientificsideli00fernrich
3. File name on Commons: Scientific side-lights (1903)
4. Format DJVU
5. Select Get Metadata
6. Goes to https://ia-upload.toolforge.org/commons/fill?iaId=scientificsideli00fernrich&commonsName=Scientific+side-lights+%281903%29&format=djvu
7. Select DjVu file source: "Use existing DJVU"
8. "Remove first page?" select "No, leave it in"
9. Press "Upload"

10 Fails with "An error occurred: Server error: POST https://commons.wikimedia.org/w/api.php resulted in a 504 Gateway Timeout response: upstream request timeout "

Another failure with the same steps to reproduce : godeysmagazin48v49gode

Also,
capitalvol1
capitalvol3

Seems to be a size or time to upload issue.

Another,
magazineofart05londuoft

Another,
lclaircissemen00palsuoft
L'éclaircissement de la langue française (1852)

dictionaryofhymn02lond
A dictionary of hymnology Vol. 2 Setting forth the origin and history of Christian hymns of all ages and nations (1907)

japanitshistorya00brin_1
Japan, its history, arts, and literature (1901 V1)

worksofrichardhu07hurd
The works of Richard Hurd, Lord Bishop of Worcester (1811 V7)