Hi Stephaniec,
Could you let us know if you are using Adobe Reader desktop application to export pdf or using a web browser online through the- https://cloud.acrobat.com/exportpdf
If using Reader, check if an update is available for Reader using "Check for updates" option under "Help" menu, reboot the machine after installing update and try again. If using a browser, try using a different browser like Chrome, or Firefox, or Safari and see if this brings any difference.
For more troubleshooting, please refer to this link: Troubleshooting Create PDF, Export PDF, Adobe Send, Fill & Sign … services(PDFPack or Document Cloud Services).
Thank You,
Shivam