<ion-icon *ngIf="!course.courseimage" name="fas-graduation-cap" slot="start" aria-hidden="true">
</ion-icon>
<ion-avatar *ngIf="course.courseimage" slot="start">
    <img [src]="course.courseimage" core-external-content alt="" (error)="loadFallbackCourseIcon()" />
</ion-avatar>