Problem installing script

[ckAutoKartz]

Hello,

I am trying to install the package as the given instruction. But when I issue "Composer Install" I get the following errors. I am totally new to Yii and need help. Error : E:\xampp\htdocs\yii2-shop (master) λ composer install Loading composer repositories with package information Installing dependencies (including require-dev) from lock file Your requirements could not be resolved to an installable set of packages.

Problem 1

• Installation request for yiisoft/yii2-composer 2.0.3 -> satisfiable by yiisoft/yii2-composer[2.0.3].
• yiisoft/yii2-composer 2.0.3 requires composer-plugin-api 1.0.0 -> no matching package found. Problem 2
• yiisoft/yii2-composer 2.0.3 requires composer-plugin-api 1.0.0 -> no matching package found.
• yiisoft/yii2 2.0.3 requires yiisoft/yii2-composer * -> satisfiable by yiisoft/yii2-composer[2.0.3].
• Installation request for yiisoft/yii2 2.0.3 -> satisfiable by yiisoft/yii2[2.0.3].

Potential causes:

• A typo in the package name
• The package is not available in a stable-enough version according to your minimum-stability setting see https://getcomposer.org/doc/04-schema.md#minimum-stability for more details.

[samdark]

http://www.yiiframework.com/doc-2.0/guide-start-installation.html