First time usage
In order to function properly, Behavior Analytics must query the data from and write data to your Devo data tables. The Behavior Analytics Settings modal is the place where you provide the credentials for data access. Without these credentials, Behavior Analytics cannot detect entities nor compute risk scores for them.
Therefore the first time you use Behavior Analytics, you will not see any entities in the Overview dashboard nor the Entity Analysis page. You will automatically be prompted by the Behavior Analytics Settings modal (if you have administrator privileges). You will not see entities until you have provided the requested information in the Settings modal.
Similarly, if the information you provided in the Settings modal later becomes invalid, you will need to update that information in order for Behavior Analytics to continue functioning correctly.