error ssh: Could not resolve hostname github.com for file-saver.

While executing "npm install" in one of my project, I'm facing below issue and it seems access related issue for me for **file-saver** ( ssh://git@github.com/eligrey/FileSaver.js.git)

17084 error ssh: Could not resolve hostname github.com: Name or service not known
17084 error fatal: Could not read from remote repository.
17084 error
17084 error Please make sure you have the correct access rights
17084 error and the repository exists.
17084 error
17084 error exited with error code: 128

how can I resolve it plz advise! Thanks in advance.