This did not resolve the issue fir me as right click on the PDF did not produce the "Combine files in Acrobat..." option.
What did reolve it was opening the PDF in Acrobat Pro X, and then acknowledging the annoying "Expected an array object" error.
Next I clicked:
"File" → "Action Wizard" → "Create Accessible PDFs"
Acknowledged all messages and OK's. Then I designated a new name for the PDF.
When done, I was able to open, read and use the new PDF with no more annoying "Expected an array object" errors.
AND, all editing actions were available as well.
Hope this works for you all as well.