Preview-Generator + Groupfolder + read-only Link-Share = Previews cannot be loaded (404)

[koelle25]

When sharing a folder from inside a Groupfolder via a public link, and the permissions for this link are read-only, previews cannot be loaded. Browser console reports 404 for them:

When setting the permissions of the public link share to "Editable" it immediately starts working again:

As of now it is unclear if the problem is in the code of the Previewgenerator app or the Groupfolders app. There's also an issue over there: nextcloud/groupfolders#2740

[adi-dev]

I'm dropping here as I have the same issue. I tried to look around, but not that literate with coding. Never realized that is the problem until one of my family members complained that they have to download photos first to see them.