Question: I am ready to send my first app to beta testers, so i click on '**Manage Beta**' > '**Manage testers**'

![add a new List with one tester in it](https://i.stack.imgur.com/omaHR.png).

and '**Save**' and '**Resume**'

APK is uploaded > '**Review**'

The review summary says '*This release is ready to be rolled out.*', but the button labled with '**Start to rollout to beta**' is disabled: ![disabled button](https://i.stack.imgur.com/TH9Bd.png).

Answer: 
You also need to make sure that you made it available in at least one country.
By default not one country is selected!
You will need to complete the Store listing, Pricing & distribution and Content rating before you can publish the app, once these task have been completed you should be able to publish the app.