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: 
Saranga is right from my experience. Before I could send out a beta version I had to ensure I had the images under store listing included. Just look at the side bar (see image) and see whats greyed out and thats where the problem was for me.

[![enter image description here](https://i.stack.imgur.com/eUbzC.png)](https://i.stack.imgur.com/eUbzC.png)
If this is your first app, the problem will be due to payment processing which can take up to 48 hours according to your Google Play Developer Console under Account Details. Here is the actual text:

Payment Pending

Your payment is still processing, which will take up to 48 hours.

You can already start to upload APKs and prepare Store listings but not publish any applications yet.

We will notify you when the payment went through and you can publish your applications.