Datepicker not loading in sapui5 application

hi,

i have used date picker component in sapui5 application.. i am getting the following error when i click on the date picker..

sap-ui-core.js:174 Uncaught Error: failed to load 'sap/ui/unified/Calendar.js' from ../../resources/sap/ui/unified/Calendar.js: SyntaxError: Unexpected token <

please suggest me solution...did any of u faced this issue before??