Bannerslider module "Incorrect dependency in class" error

Question

I am working on a Magento 2.1.7 shop. To achieve this, I have created a child-theme of Magento Blank.

I have installed the Bannerslider module.

I run the commands:

1. php bin/magento module:enable Magestore_Bannerslider
2. php bin/magento setup:upgrade
3. php bin/magento setup:di:compile

All was ok in my local development environment, but on staging environment I get an error Incorrect dependency in class Magestore\Bannerslider\Controller\Index in /var/www/staging.domain.com/app/code/Magestore/Bannerslider/Controller/Index.php \Magento\Framework\ObjectManagerInterface already exists in context object in the console.

Also, Error log record number: 1455276823131 error in the browser (frontend).

Why is that? What is the fix? Thank you!

Answer 1

Add this line in your _construct function

$this->_objectManager = $context->getObjectManager();

/var/www/staging.domain.com/app/code/Magestore/Bannerslider/Controller/Index.php

public function __construct(
    \Magento\Framework\App\Action\Context $context,
    \Magestore\Bannerslider\Model\SliderFactory $sliderFactory,
    \Magestore\Bannerslider\Model\BannerFactory $bannerFactory,
    \Magestore\Bannerslider\Model\ReportFactory $reportFactory,
    \Magestore\Bannerslider\Model\ResourceModel\Report\CollectionFactory $reportCollectionFactory,
    \Magento\Framework\Controller\Result\RawFactory $resultRawFactory,
    \Magento\Framework\Logger\Monolog $monolog,
    \Magento\Framework\Stdlib\DateTime\Timezone $stdTimezone
) {
    parent::__construct($context);
    $this->_sliderFactory = $sliderFactory;
    $this->_bannerFactory = $bannerFactory;
    $this->_reportFactory = $reportFactory;
    $this->_reportCollectionFactory = $reportCollectionFactory;
    $this->_resultRawFactory = $resultRawFactory;
    $this->_monolog = $monolog;
    $this->_stdTimezone = $stdTimezone;
    $this->_objectManager = $context->getObjectManager(); // Add this line
}