What does (pkdownloadError error 8.) mean?

MacOS Catalina Installation Stuck or Fails with “The operation couldn’t be completed. (PKDownloadError error 8.)”

This error has been reported to occur during installation of MacOS Catalina if the internet connection is disrupted or disconnected.

Insure that the Mac has an active wi-fi or ethernet connection and that the internet works as expected, and then try installing MacOS Catalina again.

https://osxdaily.com/2019/10/09/troubleshooting-macos-catalina-problems/#:~:text=(PKDownloadError%20error%208.)%E2%80%9D,try%20installing%20MacOS%20Catalina%20again.

change the DNS settings on my home router to OpenDNS (https://use.opendns.com/)

https://apple.stackexchange.com/questions/372785/pkdownloaderror-error-8-upon-catalina-update

System Preferences>Network, unlock the lock if need be, highlight the Interface you use to connect to Internet, click on the advanced button, click on the DNS tab, click on the little plus icon, then add these numbers...

8.8.8.8

8.8.4.4

1.1.1.1

9.9.9.9

Apply.