在主线程中，值会从与线程安全函数关联的队列中移除，通常是在一个空闲循环中。此错误表示在尝试启动循环时发生了错误。
【On the main thread, values are removed from the queue associated with the
thread-safe function in an idle loop. This error indicates that an error
has occurred when attempting to start the loop.】