Omeka a rencontré une erreur

Apache_Solr_HttpTransportException

'400' Status: Bad Request

exception 'Apache_Solr_HttpTransportException' with message ''400' Status: Bad Request' in /home/www/plugins/SolrSearch/lib/solr-php-client/Service.php:338
Stack trace:
#0 /home/www/plugins/SolrSearch/lib/solr-php-client/Service.php(1177): Apache_Solr_Service->_sendRawGet('http://localhos...')
#1 /home/www/plugins/SolrSearch/controllers/ResultsController.php(108): Apache_Solr_Service->search('Schiavit\xC3\xB9 eoik...', 0, '15', Array)
#2 /home/www/plugins/SolrSearch/controllers/ResultsController.php(68): SolrSearch_ResultsController->_search(0, '15', false)
#3 /home/www/application/libraries/Zend/Controller/Action.php(516): SolrSearch_ResultsController->indexAction()
#4 /home/www/application/libraries/Zend/Controller/Dispatcher/Standard.php(308): Zend_Controller_Action->dispatch('indexAction')
#5 /home/www/application/libraries/Zend/Controller/Front.php(954): Zend_Controller_Dispatcher_Standard->dispatch(Object(Zend_Controller_Request_Http), Object(Zend_Controller_Response_Http))
#6 /home/www/application/libraries/Zend/Application/Bootstrap/Bootstrap.php(105): Zend_Controller_Front->dispatch()
#7 /home/www/application/libraries/Zend/Application.php(382): Zend_Application_Bootstrap_Bootstrap->run()
#8 /home/www/application/libraries/Omeka/Application.php(79): Zend_Application->run()
#9 /home/www/index.php(23): Omeka_Application->run()
#10 {main}