We are sorry for not being able to reply to your query on time.
Looking at your account information we see that you are an active subscriber of Export PDF service. If you are still experiencing the same problem then you try the steps suggested below-
1- Export PDF is an online service that you can use online via: https://cloud.acrobat.com/exportpdf
Sign Out & Sign In once if you have already signed in.
2- You can also use the services through free desktop version of Adobe Acrobat Reader DC: Adobe Acrobat Reader DC Install for all versions
3- “Sign In” using the email (Adobe ID) under which you have subscription registered.
4- For detailed description of how to use the Export PDF service, you may refer to- Using Adobe Export PDF
You may refer to the following link for any troubleshooting: Troubleshooting Create PDF, Export PDF, Adobe Send, Fill & Sign … services(PDFPack or Document Cloud...
Let us know if it still doesn't work.