Unable to edit using VI while completing the practice tests

I stuck here in each practice test. unable to edit the yaml and save it. Any help with detailed steps would help us to complete the practice tests. Thanks.

@mmumshad Can you please help here.

I had checked it from my side and it is working fine, all you have to do is to ensure that you are in insert mode using the vi editor by using ESC,i
Then after edititng save using ESC , :wq
Hope this helps!

Do I need to install this editor locally?

no, it is already installed, you can use it simply by running the following command

$ vi filename

Great! Thanks for clearing the blocker. Am able to proceed further.

You are welcome! @KiranDadireddy