Learning Linux Basics Course & Labs

Dear Team,

i need to complete the the Learning Linux Basics Course & Labs, their is issue in the lab final troubleshoot scenario in the question number 13 i edit the host still it giving the error, attached the screenshot for your reference.

Additionally i am not getting the notes, kindly help notes as well !

Have you saved the file settings.py? If you didn’t, that would be consistent with this error.