Problems downloading/installing Acrobat from the app manager

I am getting the following message when attempting to download Acrobat. I do not know why it's no longer installed on my computer, nor why this message pops up:

Adobe Genuine Software Validation Failure. The product you are trying to install is not an Adobe Genuine Software and appears to be counterfeit.

How can this be? I am attempting to install software directly through Adobe- how can it be counterfeit. Any suggested solutions welcome.