Laravel PackageManifest.php line 131: Undefined index: name

I updated the composer with this command:

composer self-update

It was updated to version 2.0.4. Then when I tried to launch my Laravel project using:

php artisan serve

I got this error:

In PackageManifest.php line 131:

 Undefined index: name

I tried getting back to the old version of the composer with this:

composer self-update --rollback

The composer was downgraded to version 1.9.3, but it didn’t help with the error. Then I used this command to update the composer again:

composer self-update --stable

And still got the same error.

This is the line 131 of the PackageManifest.php file:

return [$this->format($package['name']) => $package['extra']['laravel'] ?? []];

Answer

First, you should check again version after using composer self-update. Then, you try composer update. Finally, you run php artisan serve.