ng serve yields this result for me:

ERROR in ./node_modules/ng-uikit-pro-standard/assets/scss/mdb.scss (./node_modul
es/@angular-devkit/build-angular/src/angular-cli-files/plugins/raw-css-loader.js
!./node_modules/postcss-loader/src??embedded!./node_modules/sass-loader/lib/load
er.js??ref--14-3!./node_modules/ng-uikit-pro-standard/assets/scss/mdb.scss)
Module build failed (from ./node_modules/sass-loader/lib/loader.js):

@import "core/bootstrap/functions";
^
      File to import not found or unreadable: core/bootstrap/functions.
      in C:\node_apps\eds4\client\node_modules\ng-uikit-pro-standard\assets\scss
\mdb.scss (line 31, column 1)
i ?wdm?: Failed to compile.

angular.json

        "styles": [
          "node_modules/@progress/kendo-theme-material/dist/all.css",
          "node_modules/font-awesome/scss/font-awesome.scss",
          "node_modules/@fortawesome/fontawesome-free/scss/fontawesome.scss",
          "node_modules/@fortawesome/fontawesome-free/scss/solid.scss",
          "node_modules/@fortawesome/fontawesome-free/scss/regular.scss",
          "node_modules/@fortawesome/fontawesome-free/scss/brands.scss",
          "node_modules/ng-uikit-pro-standard/assets/scss/bootstrap/bootstrap.scss",
          "node_modules/ng-uikit-pro-standard/assets/scss/mdb.scss",
          "src/styles.scss"              
        ],

package.json

"ng-uikit-pro-standard": "git+https://oauth2:XXXXX_XXXXX@git.mdbootstrap.com/mdb/angular/ng-uikit-pro-standard.git",

ng --version

Angular CLI: 7.3.2
Node: 8.12.0
OS: win32 x64
Angular: 7.2.5

Package                           Version
-----------------------------------------
@angular-devkit/architect         0.11.4
@angular-devkit/build-angular     0.11.4
@angular-devkit/build-optimizer   0.11.4
@angular-devkit/build-webpack     0.11.4
@angular-devkit/core              7.0.7
@angular-devkit/schematics        7.3.2
@angular/cdk                      7.3.2
@angular/cli                      7.3.2
@angular/material                 7.3.2
@angular/pwa                      0.10.7
@ngtools/webpack                  7.1.4
@schematics/angular               7.3.2
@schematics/update                0.13.2
rxjs                              6.4.0
typescript                        3.2.4
webpack                           4.23.1