How to fix an event playing audio in Wwise but not in game and I get "Selected Child Not Available" in profiler?

Question

Im trying to set up some sounds to play in game. I set up the events to match the game calls I made. According to the profiler the events are called, the action is called correctly, but then I get "Selected Child Not Available: " error. I am playing from a random container and none of the audio files work. I have checked the Soundbank Editor to make sure files are included (in the edit tab) and they are there. I have re-imported the audio files. I have changed the event to play a single different audio file instead of the random container. The containers, event, and single audio file all play in Wwise. Any help would be welcome.