Why might the Publish working version to Google Play button be unavailable?

Question

Google Play

Hello!
This is my first time trying to publish an app on Google Play and I have questions.
- Why might the button Publish working version to Google Play be unavailable? What are the reasons?
- Is it obligatory to publish the beta version first, or can I immediately work? In the beta version, the button is also not available ..
- The checkmark where Application versions is green, and the checkmarks Description , Age restrictions, they are gray. Is this normal or should they be green too?
So everything seems to be filled in, there is a privacy policy, but something cannot be published ...
here is a screen:

Answer 1

Because you need to fill in all the required items. That's where the gray checkmarks on the screen should be green.