Script @php artisan package:discover handling the post-autoload-dump event returned with error code 255

Question

I moved my project from desk to another.
When I run php artisan it does not work.

I tried to run composer update, but it returns the

Answer 1

Do you have .env file in your new project?

I had same error message. When I add .env file, error is gone.

success message like this.

Generating optimized autoload files
> Illuminate\Foundation\ComposerScripts::postAutoloadDump
> @php artisan package:discover
Discovered Package: fideloper/proxy
Discovered Package: ixudra/curl
Discovered Package: laravel/tinker
Discovered Package: nesbot/carbon
Discovered Package: socialiteproviders/manager
Package manifest generated successfully.

I hope this will help you.