错误：ERROR Cannot read properties of null (reading ‘type‘)

<template>
  <el-card>
    <el-row :gutter="20" class="header">
      <el-col :span="7">
        <el-input placeholder="请输入商品大类名称..." v-model="queryForm.query" clearable></el-input>
      </el-col>
      <el-button type="primary" :icon="Search" @click="initBigTypeList">搜索</el-button>
      <el-button type="primary" :icon="DocumentAdd" @click="handleDialogValue()">添加商品大类</el-button>
    </el-row>
    <el-table :data="tableData" stripe style="width: 100%">
      <el-table-column prop="id" label="#ID" width="80" />
      <el-table-column prop="name" label="商品大类名称" width="200" />
      <el-table-column prop="image" label="商品大类图片" width="200">
        <template v-slot="scope">
          <img :src="getServerUrl()+'/image/bigType/'+scope.row.image" width="80" height="80"/>
        </template>
      </el-table-column>
      <el-table-column prop="remark" label="商品大类描述"/>
      <el-table-column prop="action" label="操作" width="300" fixed="right">
        <template v-slot="scope">
          <el-button type="success" @click="handleImageDialogValue(scope.row)">更换图片</el-button>
          <el-button type="prima