php - Write Permissions for Orange HRM on Heroku

one text

I'm having a problem installing Orange HRM on Heroku. I have created the files in the server and given appropriate conditions but I'm still not able get rid of the errors,

Write Permissions for "lib/logs"

Write Permissions for "symfony/cache"

Write Permissions for "symfony/log"

All are "Not Writeable*"

Installation Error

A view of my folder permissions for example for the 'logs' folder:

rwx------ 3 u6666 dyno 4096 Nov 30 13:07 confs
drwxrwxrwx 2 u6666 dyno 4096 Nov 30 13:42 logs

I changed it with:

chmod -R 777 logs/

Before that it was:

drwx------ 3 u6666 dyno 4096 Nov 30 13:07 confs
drwx------ 2 u6666 dyno 4096 Nov 30 13:42 logs

Im using PHP Buildpack, and ClearDB MSQL. My composer.json file looks like this:

{
  "require" : {
    "php": "~7.3.0" 
  },
  "require-dev": {
    "heroku/heroku-buildpack-php": "*"
  }
}

Someone please tell me what I'm doing wrong. Cheers