Go to BP_AnimationInterface then in the My blueprint panel select Add New and create a new function. Call it Player Killed Animation like in the image below and compile and save.

Next go to the ThirdPerson_Anim and compile. Then delete the highlighted node shown in the image below.

Next create the highlighted node shown in the image below and connect it up like the image.

Next go to the location shown at the top of the screenshot below and delete the highlighted nodes to your bp. Then compile and save.

Next go to the location shown at the top of the screenshot below and add the highlighted nodes to your bp. Then compile and save.

Next go to the locations shown at the top of the screenshots below and delete the highlighted nodes.

Next play the game in editor, it will take a while to start this is because alot of code has to be recompiled.

Next add the nodes shown highlighted below, locations at the tops of the screenshots.

Next delete the nodes shown highlighted below, locations at the tops of the screenshots. Making sure if the nodes have code after them you connect the execute pins after deleting.

Next images are in the first person anim bp.

Add the highlighted nodes shown below.

Next delete the highlighted nodes, if there is code after the code you deleted then make sure you reconnect the execute pins.

Next replace the nodes you have in the locations shown in the screenshots with the highlighted nodes in the images below, locations at the top of the screenshots.

Do the same for these images but this is in the first person anim bp