ng serve reports error

[Nditah]

I downloaded and unzip the premium package. Then take npm install as usual. But ng serve fails.
I am using Ubuntu 18 and Angular 9 globally installed.

I even, later on, tried these but it didn't work:

npm i @angular-devkit/build-angular@"^0.13.9"

ng update @angular/cli @angular/core

npm install typescript@">=3.4 <3.5" --save-dev

npm install node-sass@4.10.0 --no-save

Here is the the default error response immediatly after npm install

ERROR in ./node_modules/sweetalert2/src/sweetalert2.scss (./node_modules/@angular-devkit/build-angular/src/angular-cli-files/plugins/raw-css-loader.js!./node_modules/postcss-loader/src??embedded!./node_modules/sass-loader/lib/loader.js??ref--14-3!./node_modules/sweetalert2/src/sweetalert2.scss)
Module build failed (from ./node_modules/sass-loader/lib/loader.js):
Error: Cannot find module 'node-sass'
Require stack:
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/sass-loader/lib/loader.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/loader-runner/lib/loadLoader.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/loader-runner/lib/LoaderRunner.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/webpack/lib/NormalModule.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/webpack/lib/NormalModuleFactory.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/webpack/lib/Compiler.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/webpack/lib/webpack.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular-devkit/build-webpack/src/webpack/index.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular-devkit/build-webpack/src/index.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular-devkit/build-angular/src/dev-server/index.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular-devkit/architect/src/architect.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular-devkit/architect/src/index.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular/cli/models/architect-command.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular/cli/commands/build-impl.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular/cli/node_modules/@angular-devkit/schematics/tools/export-ref.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular/cli/node_modules/@angular-devkit/schematics/tools/index.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular/cli/utilities/json-schema.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular/cli/models/command-runner.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular/cli/lib/cli/index.js
- /usr/lib/node_modules/@angular/cli/lib/init.js
- /usr/lib/node_modules/@angular/cli/bin/ng
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:793:17)
    at Function.Module._load (internal/modules/cjs/loader.js:686:27)
    at Module.require (internal/modules/cjs/loader.js:848:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Object.sassLoader (/home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/sass-loader/lib/loader.js:46:72)
ERROR in ./node_modules/bootstrap/scss/bootstrap.scss (./node_modules/@angular-devkit/build-angular/src/angular-cli-files/plugins/raw-css-loader.js!./node_modules/postcss-loader/src??embedded!./node_modules/sass-loader/lib/loader.js??ref--14-3!./node_modules/bootstrap/scss/bootstrap.scss)
Module build failed (from ./node_modules/sass-loader/lib/loader.js):
Error: Cannot find module 'node-sass'
Require stack:
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/sass-loader/lib/loader.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/loader-runner/lib/loadLoader.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/loader-runner/lib/LoaderRunner.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/webpack/lib/NormalModule.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/webpack/lib/NormalModuleFactory.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/webpack/lib/Compiler.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/webpack/lib/webpack.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular-devkit/build-webpack/src/webpack/index.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular-devkit/build-webpack/src/index.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular-devkit/build-angular/src/dev-server/index.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular-devkit/architect/src/architect.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular-devkit/architect/src/index.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular/cli/models/architect-command.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular/cli/commands/build-impl.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular/cli/node_modules/@angular-devkit/schematics/tools/export-ref.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular/cli/node_modules/@angular-devkit/schematics/tools/index.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular/cli/utilities/json-schema.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular/cli/models/command-runner.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular/cli/lib/cli/index.js
- /usr/lib/node_modules/@angular/cli/lib/init.js
- /usr/lib/node_modules/@angular/cli/bin/ng
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:793:17)
    at Function.Module._load (internal/modules/cjs/loader.js:686:27)
    at Module.require (internal/modules/cjs/loader.js:848:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Object.sassLoader (/home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/sass-loader/lib/loader.js:46:72)
ERROR in ./src/assets/scss/now-ui-dashboard.scss (./node_modules/@angular-devkit/build-angular/src/angular-cli-files/plugins/raw-css-loader.js!./node_modules/postcss-loader/src??embedded!./node_modules/sass-loader/lib/loader.js??ref--14-3!./src/assets/scss/now-ui-dashboard.scss)
Module build failed (from ./node_modules/sass-loader/lib/loader.js):
Error: Cannot find module 'node-sass'
Require stack:
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/sass-loader/lib/loader.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/loader-runner/lib/loadLoader.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/loader-runner/lib/LoaderRunner.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/webpack/lib/NormalModule.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/webpack/lib/NormalModuleFactory.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/webpack/lib/Compiler.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/webpack/lib/webpack.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular-devkit/build-webpack/src/webpack/index.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular-devkit/build-webpack/src/index.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular-devkit/build-angular/src/dev-server/index.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular-devkit/architect/src/architect.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular-devkit/architect/src/index.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular/cli/models/architect-command.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular/cli/commands/build-impl.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular/cli/node_modules/@angular-devkit/schematics/tools/export-ref.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular/cli/node_modules/@angular-devkit/schematics/tools/index.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular/cli/utilities/json-schema.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular/cli/models/command-runner.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular/cli/lib/cli/index.js
- /usr/lib/node_modules/@angular/cli/lib/init.js
- /usr/lib/node_modules/@angular/cli/bin/ng
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:793:17)
    at Function.Module._load (internal/modules/cjs/loader.js:686:27)
    at Module.require (internal/modules/cjs/loader.js:848:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Object.sassLoader (/home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/sass-loader/lib/loader.js:46:72)
ERROR in ./src/app/components/image-upload/image-upload.component.scss
Module build failed (from ./node_modules/sass-loader/lib/loader.js):
Error: Cannot find module 'node-sass'
Require stack:
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/sass-loader/lib/loader.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/loader-runner/lib/loadLoader.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/loader-runner/lib/LoaderRunner.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/webpack/lib/NormalModule.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/webpack/lib/NormalModuleFactory.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/webpack/lib/Compiler.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/webpack/lib/webpack.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular-devkit/build-webpack/src/webpack/index.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular-devkit/build-webpack/src/index.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular-devkit/build-angular/src/dev-server/index.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular-devkit/architect/src/architect.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular-devkit/architect/src/index.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular/cli/models/architect-command.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular/cli/commands/build-impl.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular/cli/node_modules/@angular-devkit/schematics/tools/export-ref.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular/cli/node_modules/@angular-devkit/schematics/tools/index.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular/cli/utilities/json-schema.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular/cli/models/command-runner.js
- /home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/@angular/cli/lib/cli/index.js
- /usr/lib/node_modules/@angular/cli/lib/init.js
- /usr/lib/node_modules/@angular/cli/bin/ng
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:793:17)
    at Function.Module._load (internal/modules/cjs/loader.js:686:27)
    at Module.require (internal/modules/cjs/loader.js:848:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Object.sassLoader (/home/CreativeTim/now-ui-dashboard-pro-angular-v1.0.1/node_modules/sass-loader/lib/loader.js:46:72)
ℹ ｢wdm｣: Failed to compile.
^C