Error after upgraded to 2.3.0

Question

Recently I had upgraded version from 2.2.6 to 2.3.0 everything is working fine except frontend.It is showing below exception.Admin working perfectly.

1 exception(s):Exception #0 (Magento\Framework\Exception\RuntimeException): Type Error occurred when creating object: Magento\Cms\Model\Wysiwyg\CompositeConfigProvider

Exception #0 (Magento\Framework\Exception\RuntimeException): Type Error occurred when creating object: Magento\Cms\Model\Wysiwyg\CompositeConfigProvider 0/var/www/magentohost/public_html/vendor/magento/framework/ObjectManager/Factory/Compiled.php(108): Magento\Framework\ObjectManager\Factory\AbstractFactory->createObject('Magento\Cms\Mod...', Array)

Answer 1

You have the issue at __construct(.

You must pass context object \Magento\Framework\App\Action\Context $context to parent class Magento\Framework\App\Action\Action

public function __construct(
\Magento\Framework\App\Action\Context $context,
    CustomHelper $helper
) {
    $this->helper = $helper;
parent::__construct($context);
}

after this changes donot forgot to do Di compile

Answer 2

Try the following,

This error usually means your generated sources are out of date. It doesn't seem to recognize that the $pricingHelper argument is there, which suggests it hasn't always been (extension upgrade?). Give this a try from SSH:

Change directories to your web root (the base Magento folder) Run these commands:

php bin/magento cache:clean rm -r var/di var/generation php bin/magento setup:di:compile

The first one flushes Magento's cache, to make sure nothing is stuck/out of date there. The second one clears out all existing generated source files. And finally, the third generates fresh copies. When that's done, give it another try.

Answer 3

Finally I solved the Issue By Removing Plumrocket Extension.This extension caused the bug in Magento 2.3.0..!!