PDF page and reading says Warning, empty page.

Please help me understand. 

I just bought a very expensive scanner so that it can apply a high quality OCR to PDFs to make the text accessible. 
When the scanned image is converted to OCR'ed PDF, and I open it in Adobe's read-aloud (and testing in JAWS), it reads just this -- "Warning, empty page." I can highlight the text in the PDF. I can copy and paste that highlight into a Word document, so it most definitely does have OCR'ed text. 
Why will Adobe and JAWS not read it? I know that it still needs tagging and reading order adjusted, but even when I auto-tag in Adobe, it still shows as an image and doesn't recognize the text. Other text-to-speech readers can read aloud the text.
Please help--I'm at my wits end and I hope I didn't just waste money. 

Based on the previous replies, I was on this forum for a good hour figuring this stupid thing out. The only way to get the "Read Out Loud command to work is by running an Optical Character Recognition ( OCR ). A website called "Smallpdf" allows that to happen without paying a penny. Open that downloaded file into the newer version of  Adobe reader and that method will work.

Instead of opening the file using the Acrobat DC or Pro application, allow the file to open in your Web browser. The Read Aloud option should appear at the right in the tool bar at the top of document or window. 
This was effective for me, not using the View menu > Read Out Loud in Acrobat DC. 

MacBook user. Encountered a "warning empty page" warning and the solution was to print my text document as a PDF and upload this printed version into Adobe Acrobat. 

If you have Acrobat Pro, what I did was export to Microsoft Word, then print to PDF from Word. Upon opening, the accessibility dialog came up asking if I wanted to prep the doc for reading. After that, all good.

I use Adobe Acrobat Pro DC and could not get the Read Out Loud function to work.  I had downloaded a pdf and received the Empty Page Warning.  I finally saved the document as Plain Text .txt and then created a pdf from that Plain Text document.  Then the Read Out Loud function worked.  However, the Plan Text format remained.  I printed the original document to make it easier to read along as the text was read.  

Try printing the file to PDF using an Adobe PDF printer.  Then open that file and run the OCR.  Then it should be able to read it out loud.

Hello,

The Read Aloud seems to be inconsistant.   Sometimes it works, and other times it says aloud "Warning Empty Page".  I am using it to read PDFs.   The pages are editable, and Adobe recognizes that they are text.  I am working on a PC running Windows 10 home.  My files are up to date.

It is working on some files but not on others.  Is there a way to trouble shoot this so that the Read Aloud will work all the time, or so that I can make the necessary adjustments in order to get it working?