Tizen requires a certificate to launch an application on a (physical) device. Below are the steps on how to create one:
Go to Tools → Certificate Manager
In the Certificate Manager click the Add (plus) button to generate a new certificate.
Generate a Tizen Certificate
Give your certificate a profile name (name is free to pick)
Pick “Create a new author certificate” if you have never used one. If you already have one, then you can choose to select an existing author certificate instead.
If you decided to create a new author certificate, you will get this screen. Fill in the fields as requested with your own. Fill in a password. You can add additional fields when opening the “More details” component.
Pick “Use the default Tizen distributor certificate”
If everything went went, a pop-up will appear indicating that the certificate profile has been created.
Your certificate should now be available for selection.