I ported miccropython on stm32. And intend to use uasyncio to open the server. However, the system reports an error like

Task exception wasn't retrieved
future: <Task> coro= <generator object 'start_server' at 20005aa0>
Traceback (most recent call last):
File "uasyncio/core.py", line 176, in run_until_complete
File "uasyncio/stream.py", line 155, in start_server
OSError: [Errno 107] ENOTCONN
MicroPython v1.19.1-dirty on 2023-07-04; XREG09E0103 with STM32F405RG
Type "help()" for more information.
After looking up, I found that it was caused by the error here

s.setblocking(False)
this is my complete code

import uasyncio as asyncio
import network
import time
import machine, pyb

nic = network.WIZNET5K(machine.SPI(2), pyb.Pin.board.Y5, pyb.Pin.board.Y1)
W5500_RST = pyb.Pin('Y1', pyb.Pin.OUT_PP)
W5500_RST.low()
time.sleep_ms(10)
W5500_RST.high()
time.sleep(1)
print(0)
nic.ifconfig(('192.168.0.100', '255.255.255.0', '192.168.0.12', '8.8.8.8'))
print(1)
print(nic.ifconfig())
while nic.ifconfig()[0] == '0.0.0.0':
time.sleep_ms(100)

nic.isconnected()
print(nic.isconnected())
while nic.isconnected() == False:
time.sleep_ms(100)
print('RJ45 Connected ERROR')

print('RJ45 Connected OK')

sem = asyncio.Semaphore(1)

async def handle_echo(reader, writer):
# data = await reader.read(100)
# while True:
data = await reader.readline()
print(data)
# message = data.decode()
# print("Received %r" % message)
addr = writer.get_extra_info('peername')
print("Received %r from %r" % (data, addr))

# print("Send: %r" % message)
# writer.write(data)
# await writer.drain()

# print("Close the client socket")
# writer.close()

loop = asyncio.get_event_loop()

coro = asyncio.start_server(handle_echo, '127.0.0.1', 8888, backlog=5)

server = loop.run_until_complete(coro)

loop = asyncio.get_event_loop()
coro = asyncio.start_server(handle_echo, '192.168.0.100', 8888, backlog=5)
loop.create_task(coro)
try:
print("1")
loop.run_forever()
except KeyboardInterrupt:
print("closing")
loop.close()
Has anyone ever encountered a similar situation? How did everyone solve it?