After you've installed Dash for the first time you need to execute a few automated jobs to properly initialize the system.

In the "Dash Jobs" tab you will find the following links, each of which executes additional setup jobs in Salesforce.

Create Default Global Settings: this link creates the default Dash Global Settings record if there isn't one there already. 

Create Default Configuration: this link created the default Dash Configuration record along with default Dash journey stages & out of the box configuration settings.

Create Default Job List: creates the initial backend setup required for the Dash Scheduler.