Solution -

1.) When you click Close and Save Changes in the Settings screen, the program checks the validity of the path in the ServerName (UNC) box. You will get this error if the path does not exist or is incorrect. If you entered the path for the first time, verify you typed it correctly.

2.) If the path is correct, check to see if there is a network connectivity issue, either on the workstation's side, or the host's.