As per the description above, you are not able to open a PDF file on your computer, Is that correct?
The record shows that you are subscribed to Adobe ExportPDF service on your current Adobe ID, you can access the service thorugh the URL https://cloud.acrobat.com/exportpdf with your Adobe ID and password on a browser like Chrome, or Firefox, or Safari.
Are you not able to open all the PDF file or is it specific to one PDF file? Try updating the installed freeware Adobe Reader DC from help>check for updates. Reboot the machine and try opening the PDF file.
If it is specific to one PDF file, Is it possible to share the PDF file with us so that we can try it at our end? To share the file, please use Adobe Send feature, upload the file, share the link to files via private message only, How Do I Send Private Message