Unable to see Angular application and getting error message

[narasi51]

Hello All,

When i ma trying to execute the Sample angular application in local system and its giving error message even though if closed browser history and added the script files where if its required but still i am getting the same error message. Can you please help me on this & fix the issue

HTML1300: Navigation occurred.
index.html (1,1)

HTTP404: NOT FOUND - The server has not found anything matching the requested URI (Uniform Resource Identifier).
(XHR)GET - http://localhost:64969/npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic.umd.js

Error: (SystemJS) XHR error (404 Not Found) loading http://localhost:64969/npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic.umd.js
Error: XHR error (404 Not Found) loading http://localhost:64969/npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic.umd.js
at wrapFn (http://localhost:64969/node_modules/zone.js/dist/zone.js:1332:9)
at ZoneDelegate.prototype.invokeTask (http://localhost:64969/node_modules/zone.js/dist/zone.js:422:13)
at Zone.prototype.runTask (http://localhost:64969/node_modules/zone.js/dist/zone.js:195:21)
at ZoneTask.invokeTask (http://localhost:64969/node_modules/zone.js/dist/zone.js:498:17)
at invokeTask (http://localhost:64969/node_modules/zone.js/dist/zone.js:1744:9)
at globalZoneAwareCallback (http://localhost:64969/node_modules/zone.js/dist/zone.js:1770:17)
Error loading http://localhost:64969/npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic.umd.js as "@angular/platform-browser-dynamic" from http://loc

HTTP404: NOT FOUND - The server has not found anything matching the requested URI (Uniform Resource Identifier).
(XHR)GET - http://localhost:64969/npm:@angular/core/bundles/core.umd.js

HTTP404: NOT FOUND - The server has not found anything matching the requested URI (Uniform Resource Identifier).
(XHR)GET - http://localhost:64969/npm:@angular/platform-browser/bundles/platform-browser.umd.js