composer global require "laravel/installer"

I'm having trouble asking you to help me install this error Laravel I'm a beginner I do not know where the problem is

[Composer\Downloader\TransportException]
The "http://packagist.org/p/provider-2013%24e48c5623bcfc80a0725d0e5e18083a9
2c1bb3b59e1591733c4ed8b07280b77d7.json" file could not be downloaded: faile
d to open stream: HTTP request failed!

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