Make sure that you have the latest version of acrobat. And make sure that you didn't put your interactive container inside the row of a portal as that doesn't work.
I have reinstalled adobe acrobat and have had incremental success.
Now, at least, the pdf icon shows in the container, and no error prevails. However, the pdf still does not open up inside the container. Please see the screenshot. Does anybody know of any obstacles to making the pdf file open up in the container?
Thanks for your help. That got me part of the way by reinstalling adobe acrobat DC. Then my problem changed into a problem that was the same as someone else on here and they posted a question too, and I followed what they did, which is also installed adobe reader DC. This allowed the pdf file to display fully, not just a pdf icon.