Problem opening a PDF file protected by DRM

[Marta23450583e7av]

Hello! I have an ACSM file, recently downloaded, and I used Adobe Digital Editions to download its content, so I got the PDF file protected by DRM. I can read it using the ADE programme, but if I try to open it by clicking twice on it, I get the following message (roughly translated into English): "Error opening the document. The plug-in needed to run this command is not available".

I'm using Adobe Acrobat DC (64-bit) 21.011.20039 and Adobe Digital Editions 4.5.11 in Windows 11 64 bits.

Any ideas? What am I missing? Can anyone help me? Thanks a lot in advance!

[Bernd Alheit]

Try the forum for Adobe Digital Editions.

[Test Screen Name]

It seems as if double clicking the ACSM file is opening Acrobat. You need to use Digital Editions only, there is no possibility to use these particular DRM protected files in Acrobat.