Hello jasonm62704728
We apologize for the inconvenience caused, as per the description above, you are not able to export a multi-page PDF file to Excel, Is that correct?
Please try to convert the PDF file to Excel using the URL https://cloud.acrobat.com/exportpdf with your Adobe ID and password and see if this brings any difference.
As you mentioned, you are getting a sign-in error in Acrobat Standard DC, please sign out and sign back in with your Adobe ID and password and check for any pending updates of Acrobat from Help>Check for updates and try to convert the PDF file into Excel and see if this brings any difference.
Have you tried converting any other PDF file into Excel? Is the issue is with one specific PDF or with all the PDF? If specific to one PDF file, Is it possible to share the PDF file with us so that we can try it at our end? To share the PDF file, refer to How to share a file using Adobe Document Cloud
Let us know how it goes.
Regards,
Anand Sri.