Is RequestAsyncLoad() not supposed to work in packaged build?

Hi, as the title suggested, the RequestAsyncLoad() function did not work when I packaged my game but it works when within the editor itself. The code block containing the RequestAsyncLoad() was called but the StringReference->ResolveObject() remain as NULL and seems to be not loaded. I’ve seen many past similar cases in AnswerHub as well but there isn’t a definitive answer or solution for this problem. Hope that you guys can help me out !