how to fix error The value for a v-bind expression cannot be empty Vue Js

Iam tryng in tutorial vue js basic , but i have error on v-bind . i use v-for but having error like this :

    <template>
    <div class="todo-list">
        <todo-items 
        v-for="todo in todos" // error on here
        :title="todo.title"  // here
        :description="todo.description"/> // on here
    </div>
</template>




<script>
import TodoItems from '@/components/TodoItems.vue'
export default {
    components:{
        TodoItems
    },
    props:{
        todos:{
            required:true,
            type:Array
        }
    }

}
</script>

i dont know what happen on my code , but this tutorial is fine and not get error . but my code is have error on v-for

this error is

Errors compiling template:

The value for a v-bind expression cannot be empty. Found in "v-bind:"

can someone tell me about this error ?