Omeka has encountered an error

Zend_Http_Client_Exception

Unable to read response, or response is empty

#0 /db/omeka-sites/sailaway/plugins/Scripto/libraries/Scripto/Service/MediaWiki.php(664): Zend_Http_Client->request('POST')
#1 /db/omeka-sites/sailaway/plugins/Scripto/libraries/Scripto/Service/MediaWiki.php(454): Scripto_Service_MediaWiki->_request('parse', Array)
#2 /db/omeka-sites/sailaway/plugins/Scripto/libraries/Scripto/Service/MediaWiki.php(398): Scripto_Service_MediaWiki->parse(Array)
#3 /db/omeka-sites/sailaway/plugins/Scripto/libraries/Scripto/Document.php(424): Scripto_Service_MediaWiki->getLatestRevisionHtml('.MTQ1.MTUy')
#4 /db/omeka-sites/sailaway/plugins/Scripto/controllers/IndexController.php(183): Scripto_Document->getTranscriptionPageHtml()
#5 /db/omeka-sites/sailaway/application/libraries/Zend/Controller/Action.php(516): Scripto_IndexController->transcribeAction()
#6 /db/omeka-sites/sailaway/application/libraries/Zend/Controller/Dispatcher/Standard.php(308): Zend_Controller_Action->dispatch('transcribeActio...')
#7 /db/omeka-sites/sailaway/application/libraries/Zend/Controller/Front.php(954): Zend_Controller_Dispatcher_Standard->dispatch(Object(Zend_Controller_Request_Http), Object(Zend_Controller_Response_Http))
#8 /db/omeka-sites/sailaway/application/libraries/Zend/Application/Bootstrap/Bootstrap.php(101): Zend_Controller_Front->dispatch()
#9 /db/omeka-sites/sailaway/application/libraries/Zend/Application.php(366): Zend_Application_Bootstrap_Bootstrap->run()
#10 /db/omeka-sites/sailaway/application/libraries/Omeka/Application.php(79): Zend_Application->run()
#11 /db/omeka-sites/sailaway/index.php(23): Omeka_Application->run()
#12 {main}