Can't resolve 'rxjs/index'

hi, i got some problem when i npm install and then ng serve. the error like this

** NG Live Development Server is listening on localhost:4200, open your browser on http://localhost:4200/ **
Date: 2018-05-10T03:16:26.187Z
Hash: 51598b1e8cfdf4ca8240
Time: 14061ms
chunk {base.module} base.module.chunk.js () 648 kB  [rendered]
chunk {dashboard.module} dashboard.module.chunk.js () 50.3 kB  [rendered]
chunk {inline} inline.bundle.js (inline) 5.79 kB [entry] [rendered]
chunk {main} main.bundle.js (main) 682 kB [initial] [rendered]
chunk {polyfills} polyfills.bundle.js (polyfills) 554 kB [initial] [rendered]
chunk {registration.module} registration.module.chunk.js () 36.5 kB  [rendered]
chunk {scripts} scripts.bundle.js (scripts) 877 kB [initial] [rendered]
chunk {styles} styles.bundle.js (styles) 2.93 MB [initial] [rendered]
chunk {vendor} vendor.bundle.js (vendor) 18.4 MB [initial] [rendered]

ERROR in ./node_modules/@coreui/angular/breadcrumb/app-breadcrumb.service.js
Module not found: Error: Can't resolve 'rxjs/index' in '/Users/dimmaryanto93/workspace/mandiri.co.id/mits/ui/node_modules/@coreui/angular/breadcrumb'

webpack: Failed to compile.

Running on Windows 10, Mac Os and Linux Ubuntu

the dependencies

"dependencies": {
    "@angular/animations": "5.2.10",
    "@angular/common": "5.2.10",
    "@angular/compiler": "5.2.10",
    "@angular/core": "5.2.10",
    "@angular/forms": "5.2.10",
    "@angular/http": "5.2.10",
    "@angular/platform-browser": "5.2.10",
    "@angular/platform-browser-dynamic": "5.2.10",
    "@angular/router": "5.2.10",
    "@coreui/angular": "^2.0.0-beta.2",
    "@coreui/coreui-plugin-chartjs-custom-tooltips": "^1.1.0",
    "@ngx-translate/core": "^9.0.0",
    "@ngx-translate/http-loader": "^3.0.1",
    "angular-datatables": "^5.0.0",
    "chart.js": "2.7.2",
    "core-js": "2.5.5",
    "datatables.net": "^1.10.16",
    "datatables.net-dt": "^1.10.16",
    "flag-icon-css": "3.0.0",
    "font-awesome": "^4.7.0",
    "jquery": "^3.3.1",
    "moment": "2.22.1",
    "ng2-charts": "1.6.0",
    "ng4-loading-spinner": "^1.1.3",
    "ngx-bootstrap": "2.0.4",
    "ngx-perfect-scrollbar": "5.3.5",
    "ngx-toastr": "^8.4.0",
    "rxjs": "5.5.10",
    "simple-line-icons": "^2.4.1",
    "ts-helpers": "1.1.2",
    "zone.js": "0.8.26"
  },

coreui / coreui-free-bootstrap-admin-template

Can't resolve 'rxjs/index' #387