Fatal error: Uncaught exception 'Zend_Navigation_Exception' with message 'Invalid argument: $controller must be a string or null' in /usr/share/php/library-zend-framework/Zend/Navigation/Page/Mvc.php:323
Stack trace:
#0 /usr/share/php/library-zend-framework/Zend/Navigation/Page.php(1070): Zend_Navigation_Page_Mvc->setController(Array)
#1 /usr/share/php/library-zend-framework/Zend/Navigation/Page.php(334): Zend_Navigation_Page->set('controller', Array)
#2 /usr/share/php/library-zend-framework/Zend/Navigation/Page.php(289): Zend_Navigation_Page->setOptions(Array)
#3 /usr/share/php/library-zend-framework/Zend/Navigation/Page.php(263): Zend_Navigation_Page->__construct(Array)
#4 /usr/share/php/library-zend-framework/Zend/Navigation/Container.php(117): Zend_Navigation_Page::factory(Array)
#5 /usr/share/php/library-zend-framework/Zend/Navigation/Container.php(172): Zend_Navigation_Container->addPage(Array)
#6 /usr/share/php/library-zend-framework/Zend/Navigation/Container.php(187): Zend_Navigation_Container->addPages(Array)
#7  in /usr/share/php/library-zend-framework/Zend/Controller/Plugin/Broker.php on line 336