Why such an error in zend?

Question

Zend Framework

Fatal error: Uncaught Zend\ServiceManager\Exception\ServiceNotFoundException: A plugin by the name "Zend\Mvc\Router\Http\Literal" was not found in the plugin manager Zend\Router\RoutePluginManager in /var/www/html/vendor/ zendframework/zend-servicemanager/src/AbstractPluginManager.php on line 142
( ! ) Zend\ServiceManager\Exception\ServiceNotFoundException: A plugin by the name "Zend\Mvc\Router\Http\Literal" was not found in the plugin manager Zend\ Router\RoutePluginManager in /var/www/html/vendor/zendframework/zend-servicemanager/src/AbstractPluginManager.php on line 142
Call Stack
# Time Memory Function Location
1 0.0005 402712 {main}( ) .../index.php: 0
2 0.0194 924296 Zend\Mvc\Application::init( ) .../index.php:23
3 0.0571 3469592 Zend\Mvc\Application->bootstrap( ) .../Application.php:
273
\ServiceManager->doCreate( ) .../ServiceManager.php:200

Error in zend, what does it mean?