Hi @Bernard.Huang ,
This would be an expected and normal message to see if we haven't set up a distribution point in the JSS as a distribution point is required to be set up before we can use Casper Admin.
Information on Distribution Points can be found in the Casper Suite Administrator's Guide, which can be accessed under More >> Casper Suite Administrator's Guide on JAMF Nation.
Here's a link to the exact section about Distribution Points.
If you have additional questions on setting up Distribution Points, feel free to either ask on JAMF Nation or open up a case with your Technical Account Manager either by giving Support a call, sending an e-mail to support@jamfsoftware.com, or by using the My Support section of JAMF Nation.
Thanks!
Amanda Wulff
JAMF Support
Thanks @amanda.wulff ,
JAMF support also gave me these documents:
To setup Master Distribution Point within Casper JSS
http://docs.jamfsoftware.com/9.93/casper-suite/administrator-guide/File_Share_Distribution_Points.html
To setup a CasperShare drive within Linux server
https://jamfnation.jamfsoftware.com/article.html?id=215
Casper Admin all working now. Thanks a lot :)