Ion-spinners do not spin

I use Ionic-angular and I use the following code in some parts of my application:

<ion-spinner name = "circles"> </ion-spinner>

I commanded

ionic capacitor run android

I ran my app on both my real phone and the Android emulator And I have some problems

The first problem:

My ion-spinners do not spin

The second problem:

I used two tabs at the bottom of the program that activate their style does not work