As per the issue description mentioned above, you are getting blank page when exporting a pdf, is that correct?
On checking the details for your account using the email address you are logged into the forums, you have subscription for export pdf as well as perpetual license for acrobat DC.
Which application you are using to export pdf - acrobat or reader?
Does this happen with specific pdf or with all the pdfs?
You may also refer to the following forum threads discussing the similar issue:
Let us know if you need any help.