Add the highlighted nodes shown in the images below, location at the top of the screenshots.

Go to the BP_AIManager and create a new custom event called RespawnAI and add an input called Pawn and set the variable type to Pawn. Then copy the image below.

Next go to the Respawn AI At Location function in the BP_AIManager and copy the image below.

Next go to the BP_AISpawningVolume and create a new custom event called RespawnAI and add a new input called Pawn and set it to variable type Pawn. Then copy the image below.

Next go to the Reset AI and copy the image below.

Next go to the BP_AISpawnPoint and create a new custom event called RespawnAI and add a new input called Pawn and set the variable type to Pawn. Then copy the images below.