How to access 5.5 sdk's web

I downloaded serenity-client-5.5.0-1300321.zip,

then unzip,

then start with serenity-client\server\bin\startup.bat,

after there is no more output in the console, I tried to access https://127.0.0.1:9443/vsphere-client, nothing happens, just cant access it, I checked the port 9443 is being listened, what's wrong? Anything else should be done?

Or, is there any guide for 5.5 just like the fling sdk 6.5's setup guide?

thanks.