خطای نصب وابستگی در Composer

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برای نصب وابستگی به مشکل برخوردم...
خطای زیر:

The "https://packagist.org/p/myclabs/deep-copy%24bafd79a42ed4e11e0c9363a611393510eada6ce79c8600ae2d7e30c59a8b168f.json" file could no  
  t be downloaded: SSL: Handshake timed out                                                                                              
  Failed to enable crypto                                                                                                                
  failed to open stream: operation failed

دستورات زیر انجام دادم, حل نشد:

composer config -g repo.packagist composer https://packagist.org
composer clear-cache

دستور زیر برای صحت کارکرد درست آن وارد کردم:

composer diagnose

Checking composer.json: OK
Checking platform settings: OK
Checking git settings: OK
Checking http connectivity to packagist: OK
Checking https connectivity to packagist: WARNING
[Composer\Downloader\TransportException] The "https://packagist.org/packages.json" file could not be downloaded: SSL: Handshake timed out
Failed to enable crypto
failed to open stream: operation failed
Checking github.com rate limit: OK
Checking disk free space: OK
Composer version: 1.6.3
PHP version: 7.2.24-0ubuntu0.18.04.1
PHP binary path: /usr/bin/php7.2