Check if binding syntax is complex.
data-sap-ui-xx-bindingSyntax="complex"
write this piece of code in your index.html fie in this script tag.
| <script src="resources/sap-ui-core.js" | ||||
| id="sap-ui-bootstrap" | ||||
| data-sap-ui-libs="sap.m" | ||||
| data-sap-ui-theme="sap_bluecrystal"> |