Error:

Apache_Solr_HttpTransportException: '400' Status: Bad Request in /usr/share/solr-php-ui/Apache/Solr/Service.php:338 Stack trace: #0 /usr/share/solr-php-ui/Apache/Solr/Service.php(1170): Apache_Solr_Service->_sendRawGet() #1 /usr/share/solr-php-ui/index.php(1447): Apache_Solr_Service->search() #2 {main}