**Kibana version: 6.5.0** If text is entered into the search bar in the Advanced Settings page under the Management tab that isn't valid AST, the page crashes. For example type in `?` into the search bar on the page:  causes: 
Kibana version: 6.5.0
If text is entered into the search bar in the Advanced Settings page under the Management tab that isn't valid AST, the page crashes.
For example type in
?into the search bar on the page:causes: