Error on trying to use module with Angular

[ctp-placebo]

Getting this error when trying to install and use Spinners.
Tried removing all npm modules and re-installing.
Module was correctly added to app.module.ts.

Removing Spinners from the app > app compiles without errors.

Any assistance greatly appreciated.

Angular CLI: 7.1.4
Node: 8.11.4
OS: win32 x64
Angular: 7.2.0
Webpack: 4.29.0 / @angular/webpack: 7.3.1

ERROR in ./node_modules/@chevtek/angular-spinners/node_modules/@angular/core/@angular/core.es5.js
Module not found: Error: Can't resolve 'rxjs/Observable' in 'C:\Users\xxx\xxx\xxxx\node_modules\@chevtek\angular-spinners\node_modules\@angular\core\@angular'
ERROR in ./node_modules/@chevtek/angular-spinners/node_modules/@angular/core/@angular/core.es5.js
Module not found: Error: Can't resolve 'rxjs/Subject' in 'C:\Users\xxx\xxx\xxxx\node_modules\@chevtek\angular-spinners\node_modules\@angular\core\@angular'
ERROR in ./node_modules/@chevtek/angular-spinners/node_modules/@angular/core/@angular/core.es5.js
Module not found: Error: Can't resolve 'rxjs/observable/merge' in 'C:\Users\xxx\xxx\xxxx\node_modules\@chevtek\angular-spinners\node_modules\@angular\core\@angular'
ERROR in ./node_modules/@chevtek/angular-spinners/node_modules/@angular/core/@angular/core.es5.js
Module not found: Error: Can't resolve 'rxjs/operator/share' in 'C:\Users\xxx\xxx\xxxx\node_modules\@chevtek\angular-spinners\node_modules\@angular\core\@angular'

[oehm-smith]

That's a deal breaker.