You might have noticed that when importing a solution from one environment, i.e. Dev to another i.e. UAT or Prod, the Play button in the model-driven app is turned off.
In this post, you will learn how to turn it back on.
In the following steps, I will show you what the problem is and how you can correct it.
The issue
In the model-driven app I recently imported, I noticed that the Play button is switched off.
The solution
To troubleshoot this, tap on the model-driven app (MyModel-DrivenApp) the ellipsis 
(kebab) menu – Edit – Edit in new tab.
Then, click the Publish button.
After publishing the recently imported Model-driven app, jump into the solution and choose the model-driven app the Play button is active.
