SharePoint Framework Webpart error

Question

Hi,

 

While i tried to launch the webpart i couldnt able to launch the webpart getting the below exception.  

 

C:\Users\kbzk173\SPFx Projects\>gulp serve

module.js:550

throw err;

^

Error: Cannot find module './util/SortableSet'

at Function.Module._resolveFilename (module.js:548:15)

at Function.Module._load (module.js:475:25)

at Module.require (module.js:597:17)

at require (internal/module.js:11:18)

at Object.<anonymous> (C:\Users\kbzk173\SPFx Projects\Manage\node_modules\webpack\lib\Module.js:11:21)

at Module._compile (module.js:653:30)

at Object.Module._extensions..js (module.js:664:10)

at Module.load (module.js:566:32)

at tryModuleLoad (module.js:506:12)

at Function.Module._load (module.js:498:3)

 

Thanks

Raghav