TypeError: Cannot read property ‘$options‘ of undefined vue

vue弹框页面

<el-form :model="ruleForm" ref="ruleForm" label-width="100px" class="demo-ruleForm">
<el-row :span="10">
....
</el-row>
</el-from>
出现这个问题，没有将外层嵌套

<el-from> </el-from>标签

<el-row :span="10"> span前：必须要