customising csv-input using v-slots

[speedpoint0]

Hi, i'm trying to use the v-slots in but am getting error "Cannot read properties of null (reading 'files')". This is the code I have so far

      <vue-csv-import
        v-model="csv"
        :fields="{
          name: { required: false, label: 'Name' },
          age: { required: true, label: 'Age' },
        }"
      >
        <vue-csv-errors></vue-csv-errors>
        <vue-csv-input v-slot="{ file, change }">
          <label>
            Step 1: Upload File
            <input type="file" @change="change" />
            {{ file }}
          </label>
        </vue-csv-input>
      </vue-csv-import>