Cannot read property 'nTr' of undefined

geegee

very strange, this message pops up once I have stateSave:true.
But this worked fine minutes ago. Can anyone help
This is my code:
var table = $('#surveygrid').dataTable({
"autoWidth": false,
"pageLength": 30,
"bLengthChange": false,
"sDom": 'W<"clear">lfrtip',
select: true,
stateSave: true,
"oColumnFilterWidgets": {
"aiExclude": [0, 4, 5]
}
});