I need to convert websites to PDFs, and add multiple pages as I could in the past.

Is this what you're looking for?

And one other comment, are you sure you're in Acrobat Pro. Check to see that you did not inadvertently open Acrobat Reader.

Hi Jen

Hope you are doing well and sorry for the trouble. As described you are unable to create PDFs from website.

What happens when you try to create the PDF from the website? What is the workflow/steps you are using?

Do you get any error message  when you try to create the PDF form website? If yes please share the the screenshot of the same for a better understanding.

Would you mind sharing the version of the Adobe Acrobat DC you are using? To check the version go to Help > ABout Acrobat and make sure you have the latest version 21.05.20048 installed Go to Help > Check for Updates and reboot the computer once.

For more information please check the help page https://helpx.adobe.com/acrobat/using/converting-web-pages-pdf.html

Regards

Amal