有时此问题是由于控制器的PHP开始标记中的空间不足而引起的 面临同样的问题只是删除了以下空格:

Sometimes this issue come because of space in PHP start tag of controller facing same issue just removed whitespace in:

<?php 
namespace App\Http\Controllers\Auth;

删除空间解决了我的错误

removing the space resolved my error