Sir i have one error on GYM project

sir this is gymproject i have download from your git hub

i have open both project means angular and core in visual studio 2015 and run Angular project from npm .

when i am going login then error. 

 

error: Backend returned code 0, body was: [object ProgressEvent]

file name: app.LoginService.ts

 

 

erroe:  OPTIONS http://localhost:49749/api/Authenticate/ net::ERR_CONNECTION_REFUSED

file name: zone.js 

Hello Asif Shaikh ,

 

Please debug the code and find exact error because in screent short "something bad happened" error show consequently, we can't understand what is the problem in it.