[HELP] when i try to encode MP4, error occurs

[ssdde]

No, the default queue is empty. Since the default audio handling is 'ignore'.
You told Hybrid to add something to the queue, then probably switched to 'custom' afterwards and did not look at what Hybrid added before.

Cu Selur

maybe when i import file, and click Audio -> passthrough all, then change to custom, so there is a default audio queue.

or when i import file, click Audio -> custom, switch to Audio tab, there is a default queue already.