Hi Vaninab,
Looking at your account information, I see that you have a paid subscription of Adobe Export PDF. What exactly happen when you try to access your subscription?
1- Adobe Export PDF https://helpx.adobe.com/document-cloud/help/using-exportpdf.html is an online service that you can access online via- https://cloud.acrobat.com/exportpdf
2- You can also use the services through free desktop version of Adobe Reader- Adobe Acrobat Reader DC Install for all versions
3- You just need to “Sign In” using the email (Adobe ID) under which you have subscription registered.
Please ensure that you are working with Adobe Reader DC not Acrobat DC to access PDF Pack and "Signed In" using correct email.
For any troubleshooting, refer to- https://forums.adobe.com/docs/DOC-8841
Regards,
Akanchha