Problem using AutoTVM: socket.bind error

According to tutorial: Auto-tuning a Convolutional Network for x86 CPU — tvm 0.8.dev0 documentation

Windows10 x64, tvm-0.7.0, python3.8.6

My output is as below:

Extract tasks...
[Task  1/12]  Current/Best:    0.00/   0.00 GFLOPS | Progress: (0/800) | 0.00 spydev debugger: process 19772 is connecting
Traceback (most recent call last):
  File "C:\Users\xxx\AppData\Local\Programs\Python\Python36\lib\site-packages\tvm\rpc\server.py", line 430, in __init__
    raise sock_err
  File "C:\Users\xxx\AppData\Local\Programs\Python\Python36\lib\site-packages\tvm\rpc\server.py", line 424, in __init__
    sock.bind((host, my_port))
OSError: [WinError 10048] 通常每个套接字地址(协议/网络地址/端口)只允许使用一次。