Install and configure sftp - task issue?!

Hi @Inderpreet and @player001. I have failed this one multiple times, yet no one in the community has been able to explain the problem. Everyone just keeps dropping links in exchange for points, but no one can provide a sound explanation. I think this correct, is there something wrong with the validation script?

PS I have passed this task before, but for some reason this time it has turned into a nightmare.