15.8 Upload error on quick menu upload functions

Does image / attachment upload work outside the Quick Actions?

yes:

Can you upload attachments from view mode, from the Attachments tab?

yes:

Try also the Link dialog where you can upload an attachment.

works aswell! (TIL!)
image
image

What happens if you drop an image or a file over the editor.

Works normally:

image

Also, can you upload attachments from view mode, from the Attachments tab?

yes

All methods seem to work except the file upload method that uses the windows explorer, I also attempted:

  • various browsers (edge, chrome, firefox) which gave the same result
  • A different computor (environment / endpoint)

I’m worried the error has something to do with the URLrewriter/ link shortener setup but the error seems to suggest something else.

For clarity:

Environment:
Ubuntu Linux 22.04.2
xwiki-tomcat9-mysql