Good day, AV1963.
I appreciate you taking the time to perform the basic troubleshooting steps to get this resolved. Let's get your issue fixed so you can get back up and running in no time.
Since you've already updated your Adobe and installed the latest release of QuickBooks, I suggest downloading and running the PDF & Print Repair tool. This will recover your custom print settings, and can usually fix most common printing issues in QuickBooks Desktop.
Then, try saving a report as a PDF file.
If the issue persists, I recommend following other detailed steps outlined in this article: Troubleshoot PDF and Print problems.
From there, you shouldn't have any further issues in saving PDF files from QuickBooks.
Keep me updated on how it goes. I'm always around to help you further.