Invalid ICU message. Missing '}' | Angular Material drag & drop

I wanted to try using material drag & drop in my angular app but a component containing only this code literally copied from https://material.angular.io/cdk/drag-drop/overview

<div cdkDropList cdkDropListOrientation="horizontal" class="example-list" (cdkDropListDropped)="drop($event)">
@for (tok of sentTokens; track tok) {
<div class="example-box" cdkDrag>{{tok}}</div>
}
</div>


causes me these errors even though I don't see any unescaped brackets in this code
Invalid ICU message. Missing '}'
Unexpected character "EOF" (Do you have an unescaped "{" in your template? Use "{{ '{' }}") to escape it.)

What can be the reason?

Continue reading...