In your deployment, you've probably created Dashboards with Panels that you use to keep an eye on specific issues or help you manage resources. These custom Dashboards are usually full of important data that you rely on.
In Sumo Logic App Dashboards, each Panel uses a very targeted search. In instances where no search results are returned, these Panels will not display any information. Instead, you'll see panels that show the message "There is no data to display"
This does not mean that the app isn't working. There could be two reasons for the same:
1.) It means that no activity has occurred according to the search running behind the Panel.
2.) It means these panels use parsing operations in their underlying search query that expects a specific format. If the log data submitted does not fit the format of the parsing expressions the logs will not match the query and no data will be displayed.