Thank you Jamie KR!

I simply followed your lead and turned on XPS Document writer:

I went to Control Panel > Programs and Features > Turn Windows Features on or off, scroll down the list, and make sure the Microsoft XPS Document Writer is checked.

And could subsequently send invoice pdf again (after upgrading from Win10 to Win11).

It took me a wasted hour following intuit instructions, scrounging around doing google searches, until I found your fix.  Shame on intuit.

I'm milking it with my 2019 version and your trick got it to work on my new laptop with Win11.

Thank you for posting this!  

I tried the repair program and all the steeps QB suggested and nothing worked.  I even spent a good 40 min with a Geek at BB and he couldn't figure it out.  

The weird thing is that I could save PDF's with other programs...

I'm milking it with my 2019 QB Pro version and your trick got it to work on my new laptop with Win11.

Thank you for posting this!  

I tried the repair program and all the steeps QB suggested and nothing worked.  I even spent a good 40 min with a Geek at BB and he couldn't figure it out.  

The weird thing is that I could save PDF's with other programs...

Thank you very much!  Was starting to get frustrated with the fixes suggested.   Much appreciated.