As per the description above, you are getting a blank document when you try to convert/export a PDF into Excel, Is that correct?
You can refer to the following links which discuss the similar issue: Export PDF to Excel comes up empty
I have also checked the records and found that the Adobe ExportPDF services under your current Adobe ID is inactive and canceled, and this could be the main reason of getting a blank document.
You can check the Plan details under your Adobe account, sign in at Adobe.com>Manage Account>Plans and Products and check the details of the plans.
If you have subscribed the Adobe ExportPDF services with another Adobe ID, then log in at https://cloud.acrobat.com/exportpdf with your Adobe ID and password which has the active subscription.
Hope this helps, and keep us posted with the results.