Composer throws [ReflectionException] Class Fxp\Composer\AssetPlugin\Repository\NpmRepository does not exist

Question

I installed the latest version (1.0.0. stable) of composer and in my Yii2 project I typed this:

php composer.phar update

It gives me this error

Answer 1

In my case project on Yii2

$ composer

  [ReflectionException]
  Class Fxp\Composer\AssetPlugin\Repository\NpmRepository does not exist


  [ErrorException]
  Declaration of Fxp\Composer\AssetPlugin\Repository\AbstractAssetsRepository
  ::whatProvides() should be compatible with Composer\Repository\ComposerRepo
  sitory::whatProvides(Composer\DependencyResolver\Pool $pool, $name, $bypass
  Filters = false)

Yii2, in folder vendor/fxp you need to replace the folder composer-asset-plugin or delete it.