Hello Huang,
Please check your index.html file - looks like the system cannot find the JavaScript core resources.
Try to replace the relevant lines with these:
<script src="https://sapui5.netweaver.ondemand.com/resources/sap-ui-core.js"
id="sap-ui-bootstrap"
data-sap-ui-libs="sap.ui.commons"
data-sap-ui-theme="sap_bluecrystal">
</script>
I think this will help you out.
Regards
Dominik
