This came from this Ask Ubuntu post:
https://askubuntu.com/questions/1079793/cannot-add-ppa-key-in-18-04-nameerror-name-kurl-is-not-defined/1079823
This came from this Ask Ubuntu post:
https:/ /askubuntu. com/questions/ 1079793/ cannot- add-ppa- key-in- 18-04-nameerror -name-kurl- is-not- defined/ 1079823