problem description

the current situation is that in iview, as long as you put Option, you will report an error. The iview version number is 3.11
. I ran the official sample code directly, but reported an error. Other components are normal, but this is the only one with a problem

the environmental background of the problems and what methods you have tried

is
excuse me, what is this values and what caused it?

related codes

< template >

<Select v-model="model1" style="width:200px">
    <Option v-for="item in cityList" :value="item.value" :key="item.value">{{ item.label }}</Option>
</Select>

< / template >
< script >

export default {
    data () {
        return {
            cityList: [
                {
                    value: "New York",
                    label: "New York"
                },
                {
                    value: "London",
                    label: "London"
                },
                {
                    value: "Sydney",
                    label: "Sydney"
                },
                {
                    value: "Ottawa",
                    label: "Ottawa"
                },
                {
                    value: "Paris",
                    label: "Paris"
                },
                {
                    value: "Canberra",
                    label: "Canberra"
                }
            ],
            model1: ""
        }
    }
}

< / script >