kubeedge web app demo can not be done on the aliyun and raspberry pi 4

[flixgithub]

1. edge node on the raspberry pi 4 can connect to cloudcore which is on the aliyun Kubenetes cluster node
2. when kubectl apply -f kubeedge-web-app.yaml the web page also can be reached
3. the pi-player-app command is running on the edge raspberry pi 4 node successfully
4. but web app console log show error and music can not be played in the edge raspberry pi 4 node

i have no idea why always crdclient patch using this http://127.0.0.1:8080?
this is a default K8s Api server address and port ??
please give me a help, thanks a lot