Can't open DRM in Acrobat Reader

I purchased an ebook with DRM (ACSM file)  - installed ADE (Digital Edition 4.5) and downloaded the book. I can open it in ADE normally, but when opening in Acrobat Reader DC I´m getting the message "There was an error opening this document. The security plug-in required by this command is unavailable." I want to open the pdf so I can print it - when I try to print directly from ADE, the formatting is all messed up. Any help is GREATLY appreciated