Composer update error The "https://packagist.org/packages.json" file could not be downloaded?

Question

System administration

Hello. I'm trying to run a composer update command with Laravel 5.4, but I get this error:

"The "https://packagist.org/packages.json" file could not be downloaded: failed to open stream: ▒▒▒▒▒▒▒ ▒▒▒▒▒▒▒▒▒▒ ▒▒▒▒▒▒▒▒▒▒ ▒▒▒▒ ▒▒▒▒▒▒▒▒▒▒▒, ▒.▒. ▒▒ ▒▒▒▒▒▒▒ ▒               ▒▒▒▒▒▒▒▒▒ ▒▒ ▒▒▒▒▒▒▒▒▒ ▒▒▒▒▒ ▒▒ ▒▒▒▒▒▒▒ ▒▒▒▒▒▒ ▒▒▒▒▒▒, ▒▒▒ ▒▒▒▒ ▒▒▒▒▒▒▒▒▒ ▒▒▒ ▒▒               ▒▒▒▒▒▒▒▒▒▒▒ ▒▒▒▒▒▒▒▒▒▒ ▒▒-▒▒ ▒▒▒▒▒▒▒▒▒ ▒▒▒▒▒▒▒ ▒▒▒ ▒▒▒▒▒▒▒▒▒▒▒▒▒ ▒▒▒▒▒▒▒▒▒▒."
"https://packagist.org could not be fully loaded, package information was loaded from the local cache and may be out of date".

2 sites do not work in browsers: https://getcomposer.org/ and https://packagist.org/ , and all other sites work.
Because of this error, I can't update the project.
I noticed that when you turn on VPN in Opera, sites are loaded.
Everything worked before, tell me, what could be the problem?
Thank you.