Fatal error: Uncaught Error: Call to a member function getVersionString() on null in /w3/lt.vu.www12002/www/lib/pkp/classes/core/PKPApplication.php:248
Stack trace:
#0 /w3/lt.vu.www12002/www/classes/core/Application.php(47): PKP\core\PKPApplication->__construct()
#1 /w3/lt.vu.www12002/www/lib/pkp/includes/bootstrap.php(37): APP\core\Application->__construct()
#2 /w3/lt.vu.www12002/www/index.php(18): require_once('/w3/lt.vu.www12...')
#3 {main}
  thrown in /w3/lt.vu.www12002/www/lib/pkp/classes/core/PKPApplication.php on line 248

Fatal error: Uncaught Error: Call to a member function getContext() on null in /w3/lt.vu.www12002/www/lib/pkp/classes/core/PKPApplication.php:496
Stack trace:
#0 /w3/lt.vu.www12002/www/lib/pkp/classes/plugins/PluginRegistry.php(238): PKP\core\PKPApplication->getEnabledProducts('plugins.metadat...', NULL)
#1 /w3/lt.vu.www12002/www/lib/pkp/classes/plugins/PluginRegistry.php(127): PKP\plugins\PluginRegistry::loadFromDatabase('metadata', NULL)
#2 /w3/lt.vu.www12002/www/lib/pkp/classes/plugins/PluginRegistry.php(194): PKP\plugins\PluginRegistry::loadCategory('metadata', true)
#3 [internal function]: PKP\plugins\PluginRegistry::PKP\plugins\{closure}(Array, 'metadata')
#4 /w3/lt.vu.www12002/www/lib/pkp/classes/plugins/PluginRegistry.php(194): array_reduce(Array, Object(Closure), Array)
#5 /w3/lt.vu.www12002/www/lib/pkp/classes/scheduledTask/PKPScheduler.php(129): PKP\plugins\PluginRegistry::loadAllPlugins(true)
#6 /w3/lt.vu.www12002/www/lib/pkp/classes/core/ScheduleServiceProvider.php(87): PKP\scheduledTask\PKPScheduler->registerPluginSchedules()
#7 [internal function]: PKP\core\ScheduleServiceProvider->PKP\core\{closure}()
#8 {main}
  thrown in /w3/lt.vu.www12002/www/lib/pkp/classes/core/PKPApplication.php on line 496