When running any composer commands, sometimes you see the following error stack:

[ReflectionException] Class Fxp\Composer\AssetPlugin\Repository\NpmRepository does not exist [ErrorException] Declaration of Fxp\Composer\AssetPlugin\Repository\AbstractAssetsRepository::whatProvides() shou ld be compatible with Composer\Repository\ComposerRepository::whatProvides(Composer\DependencyRe solver\Pool $pool, $name, $bypassFilters = false)

composer global require fxp/composer-asset-plugin --no-plugins // For installing it first time

composer global update fxp/composer-asset-plugin --no-plugins // For updating plugin, if already installed