Solved - New install - unable to download config from Dell S4148T

Not sure what I have done wrong but just installed NCM and added a node (Dell S4148T-ON). I have managed to add the node into NCM to be monitored and in the device connection profile i can do the test successfully. but i cannot download the config. i get this error "Error downloading Config to SCP Host on"

Not sure how I go about troubleshooting this.