What Does "Player is not configured to have a layout with the selected theme" Notification Mean

The "Player is not configured to have a layout with the selected theme" notification will appear when: 

1. A theme is selected for a player but the layout assigned to the player does not have the same theme assigned in the layout properties.
2. A playlist is deployed to the player, overriding the layout and theme. 

This notification does not mean that content is not deployed. It is simply a reminder that a theme will be needed for the player and/or the layout if you wish to use Themes to switch between layouts.