ERROR: 'Error during cleanup of component', Object{component: AppComponent{header: true, footer: true, headerTransparent: false, headerPosition: 2, __ngContext__: 0}, stacktrace: TypeError: Cannot read properties of undefined (reading 'unMount')
TypeError: Cannot read properties of undefined (reading 'unMount')
    at SimplebarAngularComponent.call [as ngOnDestroy] (http://localhost:9876/_karma_webpack_/webpack:/node_modules/simplebar-angular/fesm2022/simplebar-angular.mjs:22:24)   
    at executeOnDestroys (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/core/fesm2022/core.mjs:11349:32)
    at cleanUpView (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/core/fesm2022/core.mjs:11252:9)
    at destroyViewTree (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/core/fesm2022/core.mjs:11076:21)
    at destroyLView (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/core/fesm2022/core.mjs:11225:9)
    at ViewRef$1.destroy (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/core/fesm2022/core.mjs:14120:9)
    at ComponentRef.destroy (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/core/fesm2022/core.mjs:16844:23)
    at PseudoApplicationComponentFixture.destroy (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/core/fesm2022/testing.mjs:287:31)
    at PseudoApplicationComponentFixture.destroy (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/core/fesm2022/testing.mjs:418:15)
    at http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/core/fesm2022/testing.mjs:2105:25}