Issue with nfsen-ng flow backend

[linhnt-hub]

My backend can not run and appear error below:
I running nfsen in docker compose.

root@253d508273d7:/var/www/html/backend# /var/www/html/backend/cli.php start
PHP Warning:  include_once(/var/www/html/backend/../vendor/autoload.php): failed to open stream: No such file or directory in /var/www/html/backend/cli.php on line 3
PHP Warning:  include_once(): Failed opening '/var/www/html/backend/../vendor/autoload.php' for inclusion (include_path='.:/usr/local/lib/php') in /var/www/html/backend/cli.php on line 3
PHP Fatal error:  Uncaught Error: Class 'mbolli\nfsen_ng\common\Debug' not found in /var/www/html/backend/cli.php:9
Stack trace:
#0 {main}
  thrown in /var/www/html/backend/cli.php on line 9
root@253d508273d7:/var/www/html/backend# 

Could you recomend for me about this issue, thanks?

[mbolli]

Check INSTALL.md for updated installation instructions. Apart from the updated PHP version, you now need to install composer and execute php composer.phar install --no-dev.