安装 Yii2，提示由于目标计算机积极拒绝，无法连接。请问这是咋回事？ [ 2.0 版本 ]

file could not be downloaded: failed to open stream: 由于目标计算机积极拒绝，无法连接。请问这是咋回事？

  - Installing codeception/phpunit-wrapper (6.0.19): Downloading (100%)
  - Installing codeception/verify (0.5.0): Downloading (100%)
  - Installing bower-asset/jquery (3.4.1): Downloading (failed)
Downloading (failed)
Downloading (failed)    Failed to download bower-asset/jquery from dist: The "https://api.github.com/repos/jquery/jquery-dist/zipball/15bc73803f76bc53b654b9fdbbbc096f56d7c03d" file could not be downloaded: failed to open stream: 由于连接方 在一段时间后没有正确答复或连接的主机没有反应，连接尝试失败。

    Now trying to download from source
  - Installing bower-asset/jquery (3.4.1): Cloning 15bc73803f from cache
  - Installing bower-asset/bootstrap (v3.4.1): Downloading (failed)
Downloading (failed)
Downloading (failed)    Failed to download bower-asset/bootstrap from dist: The "https://api.github.com/repos/twbs/bootstrap/zipball/68b0d231a13201eb14acd3dc84e51543d16e5f7e" file could not be downloaded: failed to open stream: 由于目标计算机积极拒绝，无法连接。

    Now trying to download from source
  - Installing bower-asset/bootstrap (v3.4.1):

然后就一直卡在这里了