Resource Feedback

Uncaught Exception
Message: Attempt to retrieve field with unknown name ().
Location: objects/MetadataSchema.php[1154]
Trace:
#0 objects/Resource.php(423): MetadataSchema->GetField(false)
#1 local/interface/default/LeaveFeedback.html(90): Resource->Get(NULL)
#2 local/interface/default/LeaveFeedback.html(202): LoadDataForResourceFeedback('596', NULL, NULL)
#3 lib/ScoutLib/ApplicationFramework.php(5998): include('/home/www/tesis...')
#4 lib/ScoutLib/ApplicationFramework.php(834): ApplicationFramework::IncludeFile('local/interface...', NULL)
#5 index.php(76): ApplicationFramework->LoadPage('LeaveFeedback')
#6 {main}