Omeka has encountered an error

Zend_Date_Exception

unsupported ISO8601 format ()

Zend_Date_Exception: unsupported ISO8601 format () in /senylrc_service/omeka/hrvh_omeka/omeka_production/application/libraries/Zend/Date.php:2084
Stack trace:
#0 /senylrc_service/omeka/hrvh_omeka/omeka_production/application/libraries/Zend/Date.php(1078): Zend_Date->_calculate()
#1 /senylrc_service/omeka/hrvh_omeka/omeka_production/application/libraries/Zend/Date.php(197): Zend_Date->set()
#2 /senylrc_service/omeka/hrvh_omeka/omeka_production/application/libraries/globals.php(1005): Zend_Date->__construct()
#3 /senylrc_service/omeka/hrvh_omeka/omeka_production/plugins/Scripto/views/shared/index/revision.php(50): format_date()
#4 /senylrc_service/omeka/hrvh_omeka/omeka_production/application/libraries/Omeka/View.php(114): include('/senylrc_servic...')
#5 /senylrc_service/omeka/hrvh_omeka/omeka_production/application/libraries/Zend/View/Abstract.php(888): Omeka_View->_run()
#6 /senylrc_service/omeka/hrvh_omeka/omeka_production/application/libraries/Zend/Controller/Action/Helper/ViewRenderer.php(912): Zend_View_Abstract->render()
#7 /senylrc_service/omeka/hrvh_omeka/omeka_production/application/libraries/Zend/Controller/Action/Helper/ViewRenderer.php(933): Zend_Controller_Action_Helper_ViewRenderer->renderScript()
#8 /senylrc_service/omeka/hrvh_omeka/omeka_production/application/libraries/Zend/Controller/Action/Helper/ViewRenderer.php(972): Zend_Controller_Action_Helper_ViewRenderer->render()
#9 /senylrc_service/omeka/hrvh_omeka/omeka_production/application/libraries/Zend/Controller/Action/HelperBroker.php(277): Zend_Controller_Action_Helper_ViewRenderer->postDispatch()
#10 /senylrc_service/omeka/hrvh_omeka/omeka_production/application/libraries/Zend/Controller/Action.php(527): Zend_Controller_Action_HelperBroker->notifyPostDispatch()
#11 /senylrc_service/omeka/hrvh_omeka/omeka_production/application/libraries/Zend/Controller/Dispatcher/Standard.php(308): Zend_Controller_Action->dispatch()
#12 /senylrc_service/omeka/hrvh_omeka/omeka_production/application/libraries/Zend/Controller/Front.php(954): Zend_Controller_Dispatcher_Standard->dispatch()
#13 /senylrc_service/omeka/hrvh_omeka/omeka_production/application/libraries/Zend/Application/Bootstrap/Bootstrap.php(105): Zend_Controller_Front->dispatch()
#14 /senylrc_service/omeka/hrvh_omeka/omeka_production/application/libraries/Zend/Application.php(384): Zend_Application_Bootstrap_Bootstrap->run()
#15 /senylrc_service/omeka/hrvh_omeka/omeka_production/application/libraries/Omeka/Application.php(73): Zend_Application->run()
#16 /senylrc_service/omeka/hrvh_omeka/omeka_production/index.php(23): Omeka_Application->run()
#17 {main}