Error on Laravel post-install-cmd scripts

when i try to deploy my project in heruko , This problem display "A post-install-cmd script terminated with an error"

My post install in composer

"post-install-cmd": [ "php artisan clear-compiled", "php artisan optimize", "chmod -R 777 public/", "php artisan migrate --force" ],

from Newest questions tagged laravel-5 - Stack Overflow http://bit.ly/2XGBOVD
via IFTTT