Actor animation must be set on the actor root particle, not its rig particles. From your screenshot it seems that you send out the root particles from the Actor operator, so you're then trying to apply the animation to the rig particles which won't work.
If you want to trigger an animation in the root, by some event that happens in a rig particle, you can use an Actor Collect operator to get the actor parent/root....and immediately send it to an event where the new animation happens (set the 'collect' setting to 'collect actor (parent)' and the 'test TRUE" setting to "collected particles"). Basically that tells the rig particle "grab my actor parent and send it to another event"....from there you set the new animation on it in the other event.
If you want to trigger an animation in the root, by some event that happens in a rig particle, you can use an Actor Collect operator to get the actor parent/root....and immediately send it to an event where the new animation happens (set the 'collect' setting to 'collect actor (parent)' and the 'test TRUE" setting to "collected particles"). Basically that tells the rig particle "grab my actor parent and send it to another event"....from there you set the new animation on it in the other event.