pageComponent warning Invalid prop: type Expected Object, got String

[iJOKE17]

I try to use pageComponent with custom component but I got warning prop type Expected Object, got String

<template>
  <div>
    <sliding-pagination
      :current="current"
      :total="total"
      :non-sliding-size="8"
      :sliding-ending-size="1"
      :sliding-window-size="3"
      page-component="custom-pagination-button"
      @page-change="handleChangePage"
    />
  </div>
</template>

<script>
import Vue from 'vue'
import SlidingPagination from 'vue-sliding-pagination'
import CustomPaginationButton from './CustomPaginationButton.vue'

Vue.component('custom-pagination-button', CustomPaginationButton)
components: {
    'sliding-pagination': SlidingPagination,
  },
</script>