Sorry for the delayed response.
As per the issue description mentioned above, you are facing issue when trying to export pdf into word, is that correct?
When you convert a PDF file to Word or Excel format, ExportPDF performs optical character recognition (OCR) on the PDF to convert image text to searchable/editable text. If the PDF you're converting was created from a scanned document, OCR is necessary to convert the image text in that document to rendered text that you can select and edit in Word or Excel.
If the original file has an image only, then the converted word file will also contain images which is why you are unable to edit anything.
Also, try with the different pdf that has an image and see if that works.
You may also visit the following forum thread discussing the similar issue:
Let us know if you need any help.