XpressEngine

 [Composer\Downloader\TransportException]
  The "https://xpressengine.io/packages.json" file could not be downloaded (H
  TTP/1.1 301 Moved Permanently)
 

이런 에러가 뜹니다.

이유가 뭘까요... ㅠ

전체메세지

```javascript

> Xpressengine\Plugin\Composer\Composer::command
xpressengine-installer: running in fix mode
xpressengine-installer: Plugin composer file[storage/app/composer.plugins.json] is written
> Xpressengine\Plugin\Composer\Composer::preUpdateOrInstall
Loading composer repositories with package information

  [Composer\Downloader\TransportException]
  The "https://xpressengine.io/packages.json" file could not be downloaded (H
  TTP/1.1 301 Moved Permanently)

update [--prefer-source] [--prefer-dist] [--dry-run] [--dev] [--no-dev] [--lock] [--no-custom-installers] [--no-autoloader] [--no-scripts] [--no-progress] [--no-suggest] [--with-dependencies] [-v|vv|vvv|--verbose] [-o|--optimize-autoloader] [-a|--classmap-authoritative] [--apcu-autoloader] [--ignore-platform-reqs] [--prefer-stable] [--prefer-lowest] [-i|--interactive] [--root-reqs] [--] [<packages>]...
 

```