How to fix the error when installing codeception?

Question

Composer

When executing composer global require "codeception/codeception=2.0.*"
Crashes

./composer.json has been updated                                                        
Loading composer repositories with package information                                  
Updating dependencies (including require-dev)                                           
Your requirements could not be resolved to an installable set of packages.              
                                                                                        
  Problem 1                                                                             
    - Conclusion: don't install codeception/codeception 2.0.16                          
    - Conclusion: don't install codeception/codeception 2.0.15                          
    - Conclusion: don't install codeception/codeception 2.0.14                          
    - Conclusion: don't install codeception/codeception 2.0.13                          
    - Conclusion: don't install codeception/codeception 2.0.12                          
    - Conclusion: don't install codeception/codeception 2.0.11                          
    - Conclusion: don't install codeception/codeception 2.0.10.1                        
    - Conclusion: don't install codeception/codeception 2.0.10                          
    - Conclusion: don't install codeception/codeception 2.0.9                           
    - Conclusion: don't install codeception/codeception 2.0.8                           
    - Conclusion: don't install codeception/codeception 2.0.7                           
    - Conclusion: don't install codeception/codeception 2.0.6                           
    - Conclusion: don't install codeception/codeception 2.0.5                           
    - Conclusion: don't install codeception/codeception 2.0.4                           
    - Conclusion: don't install codeception/codeception 2.0.3                           
    - Conclusion: don't install codeception/codeception 2.0.2                           
    - Conclusion: don't install codeception/codeception 2.0.1                           
    - Conclusion: remove guzzlehttp/streams 3.0.0                                       
    - Installation request for facebook/webdriver == 1.0.2.0 -> satisfiable by facebook/
webdriver[1.0.2].                                                                       
    - Installation request for codeception/codeception 2.0.* -> satisfiable by codecepti
on/codeception[2.0.0, 2.0.1, 2.0.10, 2.0.10.1, 2.0.11, 2.0.12, 2.0.13, 2.0.14, 2.0.15, 2
.0.16, 2.0.2, 2.0.3, 2.0.4, 2.0.5, 2.0.6, 2.0.7, 2.0.8, 2.0.9].                         
    - Conclusion: don't install guzzlehttp/streams 3.0.0                                
    - codeception/codeception 2.0.0 requires guzzlehttp/guzzle 4.* -> satisfiable by guz
zlehttp/guzzle[4.0.0, 4.0.1, 4.0.2, 4.1.0, 4.1.1, 4.1.2, 4.1.3, 4.1.4, 4.1.5, 4.1.6, 4.1
.7, 4.1.8, 4.2.0, 4.2.1, 4.2.2, 4.2.3].                                                 
    - guzzlehttp/guzzle 4.0.0 requires guzzlehttp/streams 1.* -> satisfiable by guzzleht
tp/streams[1.0.0, 1.1.0, 1.2.0, 1.3.0, 1.4.0, 1.5.0, 1.5.1].                            
    - guzzlehttp/guzzle 4.0.1 requires guzzlehttp/streams ~1.0 -> satisfiable by guzzleh
ttp/streams[1.0.0, 1.1.0, 1.2.0, 1.3.0, 1.4.0, 1.5.0, 1.5.1].                           
    - guzzlehttp/guzzle 4.0.2 requires guzzlehttp/streams ~1.0 -> satisfiable by guzzleh
ttp/streams[1.0.0, 1.1.0, 1.2.0, 1.3.0, 1.4.0, 1.5.0, 1.5.1].                           
    - guzzlehttp/guzzle 4.1.0 requires guzzlehttp/streams ~1.0 -> satisfiable by guzzleh
ttp/streams[1.0.0, 1.1.0, 1.2.0, 1.3.0, 1.4.0, 1.5.0, 1.5.1].                           
    - guzzlehttp/guzzle 4.1.1 requires guzzlehttp/streams ~1.0 -> satisfiable by guzzleh
ttp/streams[1.0.0, 1.1.0, 1.2.0, 1.3.0, 1.4.0, 1.5.0, 1.5.1].                           
    - guzzlehttp/guzzle 4.1.2 requires guzzlehttp/streams ~1.0 -> satisfiable by guzzleh
ttp/streams[1.0.0, 1.1.0, 1.2.0, 1.3.0, 1.4.0, 1.5.0, 1.5.1].                           
    - guzzlehttp/guzzle 4.1.3 requires guzzlehttp/streams ~1.3 -> satisfiable by guzzleh
ttp/streams[1.3.0, 1.4.0, 1.5.0, 1.5.1].                                                
    - guzzlehttp/guzzle 4.1.4 requires guzzlehttp/streams ~1.4 -> satisfiable by guzzleh
ttp/streams[1.4.0, 1.5.0, 1.5.1].                                                       
    - guzzlehttp/guzzle 4.1.5 requires guzzlehttp/streams ~1.4 -> satisfiable by guzzleh
ttp/streams[1.4.0, 1.5.0, 1.5.1].                                                       
    - guzzlehttp/guzzle 4.1.6 requires guzzlehttp/streams ~1.4 -> satisfiable by guzzleh
ttp/streams[1.4.0, 1.5.0, 1.5.1].                                                       
    - guzzlehttp/guzzle 4.1.7 requires guzzlehttp/streams ~1.4 -> satisfiable by guzzleh
ttp/streams[1.4.0, 1.5.0, 1.5.1].                                                       
    - guzzlehttp/guzzle 4.1.8 requires guzzlehttp/streams ~1.4 -> satisfiable by guzzleh
ttp/streams[1.4.0, 1.5.0, 1.5.1].                                                       
    - guzzlehttp/guzzle 4.2.0 requires guzzlehttp/streams ~2.1 -> satisfiable by guzzleh
ttp/streams[2.1.0].                                                                     
    - guzzlehttp/guzzle 4.2.1 requires guzzlehttp/streams ~2.1 -> satisfiable by guzzleh
ttp/streams[2.1.0].                                                                     
    - guzzlehttp/guzzle 4.2.2 requires guzzlehttp/streams ~2.1 -> satisfiable by guzzleh
ttp/streams[2.1.0].                                                                     
    - guzzlehttp/guzzle 4.2.3 requires guzzlehttp/streams ~2.1 -> satisfiable by guzzleh
ttp/streams[2.1.0].                                                                     
    - Can only install one of: guzzlehttp/streams[1.0.0, 3.0.0].                        
    - Can only install one of: guzzlehttp/streams[1.1.0, 3.0.0].                        
    - Can only install one of: guzzlehttp/streams[1.2.0, 3.0.0].                        
    - Can only install one of: guzzlehttp/streams[1.3.0, 3.0.0].                        
    - Can only install one of: guzzlehttp/streams[1.4.0, 3.0.0].                        
    - Can only install one of: guzzlehttp/streams[1.5.0, 3.0.0].                        
    - Can only install one of: guzzlehttp/streams[1.5.1, 3.0.0].                        
    - Can only install one of: guzzlehttp/streams[2.1.0, 3.0.0].                        
    - Installation request for guzzlehttp/streams == 3.0.0.0 -> satisfiable by guzzlehtt
p/streams[3.0.0].                                                                       
                                                                                        
                                                                                        
Installation failed, reverting ./composer.json to its original content.

Composer.json

{
    "name": "yiisoft/yii2-app-advanced",
    "description": "Yii 2 Advanced Application Template",
    "keywords": ["yii2", "framework", "advanced", "application template"],
    "homepage": "http://www.yiiframework.com/",
    "type": "project",
    "license": "BSD-3-Clause",
    "support": {
        "issues": "https://github.com/yiisoft/yii2/issues?state=open",
        "forum": "http://www.yiiframework.com/forum/",
        "wiki": "http://www.yiiframework.com/wiki/",
        "irc": "irc://irc.freenode.net/yii",
        "source": "https://github.com/yiisoft/yii2"
    },
    "minimum-stability": "stable",
    "require": {
        "php": ">=5.4.0",
        "yiisoft/yii2": "*",
        "yiisoft/yii2-bootstrap": "*",
        "yiisoft/yii2-swiftmailer": "*",
        "yiisoft/yii2-twig": "~2.0.0",
        "bower-asset/html5shiv": "*",
        "bower-asset/respond": "*",
        "yiisoft/yii2-authclient": "~2.0",
        "schmunk42/yii2-giiant": "*",
        "2amigos/yii2-ckeditor-widget": "~1.0",
        "pahanini/yii2-curl": "*",
        "olamedia/nokogiri": "*",
        "kartik-v/yii2-widget-select2": "*",
        "kartik-v/yii2-widgets": "*",
        "soundasleep/html2text": "~0.2",
        "querypath/QueryPath": ">=3.0.0",
        "yurkinx/yii2-image": "dev-master",
        "elboletaire/watimage": "*",
        "dmstr/yii2-adminlte-asset": "2.*",
        "jumper423/yii2-widget-sidenav": "dev-master",
        "jumper423/Gallery" : "dev-master",
        "jumper423/javascript-templates" : "dev-master",
        "jumper423/javascript-canvas-to-blob" : "dev-master",
        "jumper423/javascript-load-image" : "dev-master",
        "blueimp/jQuery-File-Upload": "*",
        "jumper423/yii2-images": "dev-master",
        "justinvoelker/yii2-awesomebootstrapcheckbox": "*",
        "kartik-v/yii2-widget-fileinput": "*",
        "yiisoft/yii2-imagine": "^2.0",
        "bower-asset/imagesloaded": "*",
        "bower-asset/bootstrap-vertical-tabs": "*"
    },
    "require-dev": {
        "yiisoft/yii2-codeception": "^2.0",
        "yiisoft/yii2-debug": "*",
        "yiisoft/yii2-gii": "*",
        "yiisoft/yii2-faker": "*"
    },
    "config": {
        "process-timeout": 1800
    },
    "extra": {
        "asset-installer-paths": {
            "npm-asset-library": "vendor/npm",
            "bower-asset-library": "vendor/bower"
        }
    }
}

I can not understand what it is connected with.

Answer 1

This error occurs because version 2.1.* is installed.
Therefore, first remove the current one
and then install the required version

composer global require "codeception/codeception=2.0.*"