Please provide the callstack and log files from the crash for extra information. Additionally, it would also help if you can provide steps to help me reproduce the crash on my end or provide a sample project that has the crash occurring. How are you adding/using the structs/enums in the child component? Does the crash occur if you call the AddChildActorComponent node on BeginPlay rather than in the construction script? I am unable to investigate this crash further without information on how the character/child component is setup.