UDP Receive

I am trying demo_esp32_socket _udp_cli.py on Maixduino.

I can confirm the transmission but cannot receive data.

The error is as follows.
receive error: [Errno 111] ECONNREFUSED

Is there any way to improve it?

The following firmware are used.
maixpy_v0.4.0_82_gc3327b5.bin
maixduino_esp32_firmware_v1.4.0.bin