Revert to trial https://helpx.adobe.com/manage-account-membership/cc-reverts-to-trial.html may help
-and troubleshooting FAQ https://forums.adobe.com/thread/1962238
Be sure to remain signed in with your Adobe ID before accessing the link below
-you must also allow 'cookies' in your web browser for this to work
Your account information says that you have an active subscription of Adobe Export PDF.
1- Please ensure that you are using the correct application Adobe Reader DC not Adobe Acrobat DC. There is a possibility that you have used the trial for Acrobat and that isn't working with the current subscription.
2- If you have Acrobat DC installed, please uninstall it using cleaner tool- http://labs.adobe.com/downloads/acrobatcleaner.html and install Adobe Reader- Adobe Acrobat Reader DC Install for all versions
3- Check online through https://cloud.acrobat.com/ Sign Out and Sign In once.
You may also see- 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...