Adobe Acrobat Reader DC & MIP plugin problem

[IT21991748tgp9]

Dear All

We have been using the AAR DC & MIP plugin for several years to view pdf files encrypted with Azure Information Protection. For some time now, this has been impossible. After various attempts to repair or reinstall these products, I have received the message that the dedicated version of the MIP plugin is incompatible with the Adobe Reader DC version.

(pdf files are not broken, checked with Edge browser)
What can I do about it?