pnp powershell – PnP Enable Feature not working

Ok I a working with sharepoint online where I am trying to enable open-documents in client which is not working with the following commands.

connect-pnponline -url "abcdefg"
Enable-PnPFeature -Identity 8A4B8DE2-6FD8-41e9-923C-C7C3C00F8295
Get-PNPFeature

The feature will not enable.