IOError: [Errno 2] No such file or directory: '/etc/resolv.conf' KnockMail error

[wildonion]

Hi, I've just installed this script via lazy in Kali(Rolling); But when I run it using lazy in information gathering section or try to run it in another terminal it shows me below error: IOError: [Errno 2] No such file or directory: '/etc/resolv.conf'

can somebody help me ?? what should exactly I do?