PDF Attachments not working anymore

Operating system

macOS

Joplin version

3.5.11

Desktop version info

Joplin 3.5.11 (prod, darwin)

Gerät: darwin, Apple M3 Pro
Client-ID: 4bae71a1a201474888be8ac399f2a357
Sync-Version: 3
Profil-Version: 49
Unterstützter Schlüsselbund: Ja
Alternative Instanz ID: -

Revision: e75875c

Backup: 1.5.1
Freehand Drawing: 4.2.0
Hotfolder: 1.2.2
Markdown Table: Colorize: 1.2.0

Sync target

Joplin Server

Editor

Markdown Editor

What issue do you have?

I am not able to attach a PDF to a note anymore and even my previously attached PDFs are not accessible anymore.
In the Markdown Editor I only see this:
2025 - KW30.pdf
Anyone with an idea what has happened - it was working before (yesterday I made an update of MacOS to 26.2 and to the latest version of Joplin Desktop