php artisan install eror

[Tzeenchist]

Hello! I install on the guide https://lavalite.org/docs/master/installation. Server based on CentOS 7. Installed php 7.2 (+fpm), Maria DB, nginx. Not performed php artisan lavalite:install or php artisan install.

console:

[root@... lava]# php artisan lavalite:install
PHP Warning:  require(/var/www/lava/vendor/autoload.php): failed to open stream: No such file or directory in /var/www/lava/artisan on line 18
PHP Fatal error:  require(): Failed opening required '/var/www/lava/vendor/autoload.php' (include_path='.:/usr/share/pear:/usr/share/php') in /var/www/lava/artisan on line 18

/var/www/lava/artisan on line 18: require __DIR__.'/vendor/autoload.php';

I am a beginner and I do not understand the essence of the error. Tell me how to solve.

[dtr0yan]

Try composer install first

[Tzeenchist]

Try composer install first

Same result, same error

[Younesi]

Try composer update first

[fkurtulus]

Try composer update first

Same result with composer update giving same error

[Tzeenchist]

Try composer update first

I tried again. The situation has not changed.

[fazamutash]

There might be an error with your composer install. In my case, it is out of memory so I need to increase the PHP memory limit, and run the composer install again.