laravel - 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 error

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

Answer 1

This is how I solved this after an upgrade from laravel version 6.x - 7.x:

In AppExceptionsHandler changed

//Use Exception;
Use Throwable;

Then methods to accept instances of Throwable instead of Exceptions as follows:

//public function report(Exception$exception);
public function report(Throwable $exception);

//public function render($request, Exception $exception);
public function render($request, Throwable $exception);

In configsession.php:

//'secure' => env('SESSION_SECURE_COOKIE', false),
'secure' => env('SESSION_SECURE_COOKIE', null),

Then run composer update