bin/magento error after update

Question

Hello i have updated from 2.2.8 to 2.3.1 now php bin/magento is not working:

php bin/magento list

Fatal error: Uncaught Error: Class 'Zend\Mvc\Controller\LazyControllerAbstractFactory' not found in .../vendor/zendframework/zend-servicemanager/src/ServiceManager.php:314
Stack trace:
#0 .../vendor/zendframework/zend-servicemanager/src/Config.php(137): Zend\ServiceManager\ServiceManager->addAbstractFactory('Zend\\Mvc\\Contro...')
#1 .../vendor/zendframework/zend-modulemanager/src/Listener/ServiceListener.php(225): Zend\ServiceManager\Config->configureServiceManager(Object(Zend\Mvc\Controller\ControllerManager))
#2 [internal function]: Zend\ModuleManager\Listener\ServiceListener->onLoadModulesPost(Object(Zend\ModuleManager\ModuleEvent))
#3 .../vendor/zendframework/zend-eventmanager/src/EventManager.php(490): call_user_func(Array, Object(Zend\ModuleManager\ModuleEvent))
#4 .../vendor/zendframework/zend-eventmanager/src/EventManager.php(248): Zend\EventManager\EventManager->trigger in .../vendor/zendframework/zend-servicemanager/src/ServiceManager.php on line 314

Answer 1

Following the upgrade instructions here https://devdocs.magento.com/guides/v2.3/comp-mgr/cli/cli-upgrade.html should take care of this issue. In particular for this error make sure to update your autoload section.

Answer 2

The issue can be fixed by manually editing composer.json autoload section to

"autoload": {
    "psr-4": {
        "Magento\\Framework\\": "lib/internal/Magento/Framework/",
        "Magento\\Setup\\": "setup/src/Magento/Setup/",
        "Magento\\": "app/code/Magento/",
        "Zend\\Mvc\\Controller\\": "setup/src/Zend/Mvc/Controller/"
    }
}

and then run

composer dumpautoload
php bin/magento setup:upgrade
php bin/magento setup:di:compile
php bin/magento setup:static-content:deploy

It will work.

Answer 3

You need to add "Zend\\Mvc\\Controller\\": "setup/src/Zend/Mvc/Controller/" in autoload -> psr-4 in composer.json

"autoload": {
"psr-4": {
  "Magento\\Framework\\": "lib/internal/Magento/Framework/",
  "Magento\\Setup\\": "setup/src/Magento/Setup/",
  "Magento\\": "app/code/Magento/",
  "Zend\\Mvc\\Controller\\": "setup/src/Zend/Mvc/Controller/"
},
"psr-0": {
  "": [
    "app/code/",
    "generated/code/"
  ]
},
"files": [
  "app/etc/NonComposerComponentRegistration.php"
],
"exclude-from-classmap": [
  "**/dev/**",
  "**/update/**",
  "**/Test/**"
]
},

Don't forget to :

composer update

And other Magento commands like as

bin/magento setup:upgrade
bin/magento cache:clean