Why is the vendor folder not being created and dependencies not being pulled?

Question

Composer

Good afternoon.
Faced such problem:
deployed Laravel, pull composer install / composer update
exhaust - Loading composer repositories with package information; Updating dependencies (including require-dev);
Well, that's all .. Vendor was not created, the dependencies were not pulled up, there were no errors.
If Laravel itself is installed via composer, the result is the same.
The user is not rooted, but he is right enough.
If you drag vendor with autoload (composer dump-autoload -o), dependencies are still not installed.
(centos7, nginx + php-fpm 7.1.5)
Please tell me what could be the reason, what are the ways to fix the problem?

Answer 1

composer -vvv install