错误日志：TypeError: ejs:52
    50|                 <a href="pros.html"><%= language.proTitle %></a>
    51|                 <i class="el-icon-arrow-right"></i>
 >> 52|                 <a href="pros.html?pageSize=12&productClassifyId=<%= productDetail.data.productClassifyId %>" class="pro-detail-index-name-title"><%= (productDetail && productDetail.data && productDetail.data.classifyName) ? productDetail.data.classifyName : 'Ferrosilicon' %></a>
    53|                 <i class="el-icon-arrow-right"></i>
    54|                 <a href="#" class="lastA"><%= (productDetail && productDetail.data && productDetail.data.productName) ? productDetail.data.productName : 'Ferrosilicon 75' %></a>
    55|             </div>

Cannot read properties of undefined (reading 'productClassifyId')