An error occurred during execution; please try again later.

===================================================
Additional information:

ZendJsonExceptionRuntimeException

File:
/home/lmssohotest/public_html/vendor/zendframework/zend-json/src/Json.php:68
Message:
Decoding failed: Syntax error
Stack trace:

    #0 /home/lmssohotest/public_html/setup/src/Magento/Setup/Controller/DependencyCheck.php(71): ZendJsonJson::decode('', 1)
    #1 /home/lmssohotest/public_html/vendor/zendframework/zend-mvc/src/Controller/AbstractActionController.php(82): MagentoSetupControllerDependencyCheck->componentDependencyAction()
    #2 [internal function]: ZendMvcControllerAbstractActionController->onDispatch(Object(ZendMvcMvcEvent))
    #3 /home/lmssohotest/public_html/vendor/zendframework/zend-eventmanager/src/EventManager.php(444): call_user_func(Array, Object(ZendMvcMvcEvent))
    #4 /home/lmssohotest/public_html/vendor/zendframework/zend-eventmanager/src/EventManager.php(205): ZendEventManagerEventManager->triggerListeners('dispatch', Object(ZendMvcMvcEvent), Object(Closure))
    #5 /home/lmssohotest/public_html/vendor/zendframework/zend-mvc/src/Controller/AbstractController.php(118): ZendEventManagerEventManager->trigger('dispatch', Object(ZendMvcMvcEvent), Object(Closure))
    #6 /home/lmssohotest/public_html/vendor/zendframework/zend-mvc/src/DispatchListener.php(93): ZendMvcControllerAbstractController->dispatch(Object(ZendHttpPhpEnvironmentRequest), Object(ZendHttpPhpEnvironmentResponse))
    #7 [internal function]: ZendMvcDispatchListener->onDispatch(Object(ZendMvcMvcEvent))
    #8 /home/lmssohotest/public_html/vendor/zendframework/zend-eventmanager/src/EventManager.php(444): call_user_func(Array, Object(ZendMvcMvcEvent))
    #9 /home/lmssohotest/public_html/vendor/zendframework/zend-eventmanager/src/EventManager.php(205): ZendEventManagerEventManager->triggerListeners('dispatch', Object(ZendMvcMvcEvent), Object(Closure))
    #10 /home/lmssohotest/public_html/vendor/zendframework/zend-mvc/src/Application.php(314): ZendEventManagerEventManager->trigger('dispatch', Object(ZendMvcMvcEvent), Object(Closure))
    #11 /home/lmssohotest/public_html/setup/index.php(31): ZendMvcApplication->run()
    #12 {main}`

composer require magento/product-community-edition 2.2.2 --no-update
composer update
rm -rf var/cache/*
rm -rf var/page_cache/*
rm -rf var/generation/*
bin/magento setup:upgrade
bin/magento cache:clean
bin/magento cache:flush