People can read PDF documents embedded on the site without having to download or even press a link, if their browser supports it

[mlncn]

• Show PDF with a reader.

[mlncn]

This was working but is currently not, as Mike has found:

• PDFs not appearing
  • https://demo-pece.drutopia.org/archive/artifact-pdf-document/geschlecht

That is a freshly updated PDF; this is not related to the migration.