Ionic material design ionicMaterialInk and/or ionicMaterialMotion inject issue

I download the sample project from below site.

and i create new ionic project using ionic start HelloWorld blank

and from downloaded package i find demo folder and copy www folder and replace in HelloWorld project’s www folder but i got error like

please help me for solving this issue


HI, you just run the commands inside de demo folder:

npm install (to install all depencies)

ionic serve (to run the demo application)