Error detail: No default module defined for this application

#0 /home/nginx/domains/topshare/library/Zend/Controller/Dispatcher/Standard.php(204): Zend_Controller_Dispatcher_Standard->getControllerClass(Object(Zend_Controller_Request_Http))
#1 /home/nginx/domains/topshare/library/Zend/Controller/Dispatcher/Standard.php(244): Zend_Controller_Dispatcher_Standard->isDispatchable(Object(Zend_Controller_Request_Http))
#2 /home/nginx/domains/topshare/library/Zend/Controller/Front.php(954): Zend_Controller_Dispatcher_Standard->dispatch(Object(Zend_Controller_Request_Http), Object(Zend_Controller_Response_Http))
#3 /home/nginx/domains/topshare/applications/Bootstrap.php(311): Zend_Controller_Front->dispatch()
#4 /home/nginx/domains/topshare/library/Zend/Application.php(366): Bootstrap->run()
#5 /home/nginx/domains/topshare/index.php(33): Zend_Application->run()
#6 {main}