If you go to Start >> Run and enter services.msc, then scroll down to the 'NI Application Web Server' listing, does it show the status as 'Started'?
Yes the service is showing 'start', but the application is still blank. Thanks for your reply.
Anyway I "accidently" solve my problem already with following step :
1) Restart PC and boot in to "safe mode".
2) Lunch the NI Web Server Configuration. (will pop up error and you only can press OK to close)
3) Restart PC with normal boot, and lunch again NI Web Server Configuration it already fix my blank screen problem.
I don't know how it work but it fix my problem😅