Why doesn't composer install work?

Question

Composer

Hello, please help with this problem, I created a new project exactly as described in the docs
https://laravel.com/docs/5.4#installation
An error was found
ailed opening required '/var/www/vhosts/***/bootstrap/. ./vendor/autoload.php' (include_path='.:/usr/share/pear:/usr/share/php') in /var/www/vhosts/***/bootstrap/autoload.php on line 17
moved in the project folder, the composer install command issues the
following install: missing file operand
composer update
bash: update: command not found
Thank you.