why sometime i get this error when i load my save file?

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:bust_in_silhouette: Asked By potatobanana

hi, why sometime i get this error?
what this error tell me? how to check error i did?
what i do wrong?
this my load code

func load_game_res() -> void:
    if not FileAccess.file_exists(SAVE_PATH_CUSTOM_RESOURCE):
        print(" dont have this save file in this save path")

var save_resource := ResourceLoader.load(SAVE_PATH_CUSTOM_RESOURCE, "SaveDataRes")
current_load_data = save_resource