Hello!
I hope you are doing well, and thanks for reaching out.
Could you please provide more details about your issue? We have verified your Adobe ID (email) associated with your community sign-in and confirmed that you have an active subscription to Adobe Export PDF services. Are you using the Acrobat online web services, or are you accessing it through the free Acrobat Reader desktop application and exporting the file?
If you are trying to use the services online, please change your browser and check if it is still asking to sign in after exporting the file. Also, try a different Network: Sometimes network issues can cause problems. Try converting the PDF while connected to a different network, such as a mobile hotspot.
If you are using the services via the freeware Acrobat Reader desktop app, ensure you have the latest version installed. Check for any pending updates from the app's Menu> help > check for updates. Install any available updates. Restart the app and the machine, and try exporting the file.
Let us know how it goes.
Thanks,
Anand Sri.