Hi Cinziad,
Sorry for the delay in response.
As per the issue description mentioned above, you are facing issue when trying to save pdf to pdf, is that correct?
As we have checked the account details using the email address you are logged into the forums, you have subscription for Export PDF.
Export PDF is an online service that you can use through the desktop application Adobe Acrobat Reader DC: Adobe Acrobat Reader DC Install for all versions or online using a web browser at this link: https://cloud.acrobat.com/exportpdf
You just need to “Sign In” using the email under which you have subscription registered. You may also see the help document for detailed description: FAQ | Adobe Export PDF, Document Cloud
You may also contact support using this link: Contact Customer Care
Let us know if you need any further help.
Shivam