usr bin env bash r no such file or directory on wsl ubuntu on windows

I was trying to use npm and get this message on my terminal ubuntu on windows: usr bin env bash r no such file or directory

To solve this problem:

1) Create a file: sudo vi /etc/wsl.conf
2) write this on it:

[automount]
enabled = true
mountFsTab = true
root = "/mnt/"
options =

[network]
generateHosts = true
generateResolvConf = true

[interop]
enabled = true
appendWindowsPath = true

3) Save and exit no VI press ESC and : and x ( save and exit )