vue报错EISDIR: illegal operation on a directory, read解决

• 报错：

EISDIR: illegal operation on a directory, read
Internal server error: EISDIR: illegal operation on a directory, read

• 原因：引入子组件时，子组件是xxx/文件夹名/index.vue，引入只写到了xxx/文件夹名
• 解决：引入子组件时，路径写到xxx/文件夹名/index.vue