Reader error message opening PDfs that there was an error and file damaged

On my Mac using Mac Mail I get occasional Reader messages when opening a PDF attachment  that there was an error and the file was damaged. But can open on another Mac and on ipad. Cant figure out what in the world is wrong. Thanks for any suggestions. (Did try removing and reinstalling the program) The version of reader is 11.0.03.

Thank you Catherine & MrToaster - Yes - I've just updated to my new credit card. All the details were correct, inc authorisation code but App Store kept prompting me to update iMovie then, not allowing me to (There was an error in the App Store. Please try again later. (20)).
Your advice worked - I logged out and in again.
The problem is that I'll definitely have forgotten your tip when my card next expires!

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