Codeception Acceptance suite configuration error in Yii2 - php

Question

I am trying to setting up Codeception with Yii2 Basic framework. Unit Test's are working fine. Acceptance is also working, but if I want to use WebDriver module, I get error. This is the acceptance.suite.yml file
class_name: AcceptanceTester
modules:
enabled:
- AcceptanceHelper
- WebDriver:
url: 'http://mylocalsite'
browser: phantomjs
Phantomjs is installed and running on PORT 4444.
The error I get is:
[yii\base\ErrorException]
Illegal offset type in isset or empty
This is the composer file to give you idea about versions.
{
"config": {
"vendor-dir": "protected/vendor"
},
"require": {
"yiisoft/yii2": ">=2.0.5",
"yiisoft/yii2-bootstrap": "*",
"yiisoft/yii2-swiftmailer": "*",
"guzzlehttp/guzzle": "4.*",
"mobiledetect/mobiledetectlib" : "2.8.8",
"codeception/codeception": "2.0.16",
"codeception/specify": "*",
"codeception/verify": "*",
"yii2tech/sitemap": "*",
"geoip2/geoip2":"~2.0",
"facebook/facebook-instant-articles-sdk-php": "^1.5"
},
"require-dev": {
"yiisoft/yii2-codeception": "*",
"yiisoft/yii2-composer": "*",
"yiisoft/yii2-debug": "*",
"yiisoft/yii2-gii": "*",
"yiisoft/yii2-faker": "*"
},
}
Is there any wrong with the configuration file or anyone face the same issue?

Answer 1

The following is just an assumption and is not verified. YAML configuration in old Codeception version was slightly different, AFAIK there was an additional config section. Your composer.json shows that you manually locked to "codeception/codeception": "2.0.16".
What you could try:
Update to 2.2
using "codeception/codeception": "^2.2" in composer.json
Provide additional config section
class_name: AcceptanceTester
modules:
enabled:
- WebDriver
config:
WebDriver:
url: http://mylocalsite
browser: phantomjs
port: 4444