I am deploying laravel project on heroku, but when I write “git push heroku master” it shows “ERROR: Dependency installation failed!”"


I could not deploy laravel project to Heroku First when I wrote “Heroku open” it showed “Forbidden You don’t have permission to access / on this server.” Then I added to scripts part of composer.json

"post-install-cmd": [
            "php artisan clear-compiled",
            "php artisan optimize",
            "chmod -R 775 public/"
```Then it shows this ERROR


remote: ! WARNING: A post-install-cmd script terminated with an error
remote: ! ERROR: Dependency installation failed!
remote: !
remote: ! The ‘composer install’ process failed with an error. The cause
remote: ! may be the download or installation of packages, or a pre- or
remote: ! post-install hook (e.g. a ‘post-install-cmd’ item in ‘scripts’)
remote: ! in your ‘composer.json’.
remote: !
remote: ! Typical error cases are out-of-date or missing parts of code,
remote: ! timeouts when making external connections, or memory limits.
remote: !
remote: ! Check the above error output closely to determine the cause of
remote: ! the problem, ensure the code you’re pushing is functioning
remote: ! properly, and that all local changes are committed correctly.
remote: !
remote: ! For more information on builds for PHP on Heroku, refer to
remote: ! https://devcenter.heroku.com/articles/php-support
remote: !
remote: ! REMINDER: the following warnings were emitted during the build;
remote: ! check the details above, as they may be related to this error:
remote: ! - A post-install-cmd script terminated with an error
remote: ! Push rejected, failed to compile PHP app.
remote: ! Push failed
remote: Verifying deploy…
remote: ! Push rejected to frozen-harbor-81797.
To https://git.heroku.com/frozen-harbor-81797.git
! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to ‘https://git.heroku.com/frozen-harbor-81797.git