在迁移中遇到Facade.php问题

Question

我正在使用GitHub上的现有项目，并且试图第一次运行Laravel，但我面临着

In Connection.php line 664:

  SQLSTATE[42000]: Syntax error or access violation: 1071 Specified key was too long; max key length is 1000 bytes (S
  QL: alter table `users` add unique `users_email_unique`(`email`))

In Connection.php line 458:

  SQLSTATE[42000]: Syntax error or access violation: 1071 Specified key was too long; max key length is 1000 bytes

后来我接受了一些说明并添加了 use Illuminate\Support\Facades\Schema;下的AppServiceProvider.php，但添加后出现类似

的错误

C:\wamp64\www\localseo>php artisan migrate

In Facade.php line 221:

  Call to undefined method Illuminate\Database\Schema\MySqlBuilder::defaultStringLenght()

请帮助我避免该错误。