Angular material spinner does not spin

I am new to angular and working since May on a new project with it. Now we need to add the material spinner in this existing project, but the spinner does not really spin. It only shows a static circle and I already tried the different modes. I have really no clue what I am missing and I wanted to know how I can debug this, because I don’t get any error.

Here is my setup:

package.json

"@angular/animations": "^7.2.16",
"@angular/cdk": "^7.3.7",
"@angular/common": "^7.2.16",
"@angular/compiler": "^7.2.16",
"@angular/core": "^7.2.16",
"@angular/forms": "^7.2.16",
"@angular/material": "^7.3.7",
"@angular/platform-browser": "^7.2.16",
"@angular/platform-browser-dynamic": "^7.2.16",
"@angular/router": "^7.2.16",

I added this to the UiModule:

import { MatDialogModule, MatProgressSpinnerModule } from '@angular/material';
...
@NgModule({ imports: [UiSharedModule, DpDatePickerModule, FontAwesomeModule, MatDialogModule, MatProgressSpinnerModule],
  exports: [
    ButtonComponent,
    DropdownComponent,
    InputComponent,
    TabListComponent,
    TabContentComponent,
    DatePickerComponent,
    CardComponent,
    SpinnerComponent
  ],
  declarations: [
    ButtonComponent,
    DropdownComponent,
    InputComponent,
    TabListComponent,
    TabContentComponent,
    DatePickerComponent,
    CardComponent,
    SpinnerComponent
  ]
})

In the html I tried these two version:

<mat-progress-spinner mode="indeterminate"></mat-progress-spinner>

and

<mat-spinner></mat-spinner>

I also tried the same inside of one of my angular-tutorial projects and there it is working fine! So i also thought, that I need to do some angular updates?

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