You only have one animation (GRD_idle), but AC is expecting the folowing:
1) As "Multiple directions" is checked, it's expecting e.g. GRD_idle_L (for left), GRD_idle_D (for down), depending on which direction your character is facing. Uncheck this box if you only intend to play the one animation. 2) As you have "walk", "run" and "talk" written in your Standard 2D Animations panel, it's also expecting to play e.g. walk_D when walking. Clear these boxes if you don't want to animate the character moving or talking.
For a primer on how to set up 2D characters, see the 2D tutorial video.
Comments
1) As "Multiple directions" is checked, it's expecting e.g. GRD_idle_L (for left), GRD_idle_D (for down), depending on which direction your character is facing. Uncheck this box if you only intend to play the one animation.
2) As you have "walk", "run" and "talk" written in your Standard 2D Animations panel, it's also expecting to play e.g. walk_D when walking. Clear these boxes if you don't want to animate the character moving or talking.
For a primer on how to set up 2D characters, see the 2D tutorial video.