esp_prov.py崩溃的原因？怎么解决？

ubuntu20.04
esp-idf V4.4
ESP32_LyraT

板子跑的demo是：esp-idf/examples/provisioning/legacy/softap_prov，什么都没改。
然后运行esp_prov.py崩溃
python3 esp_prov.py --transport softap  --sec_ver 1 --pop abcd1234 --ssid xxxx --passphrase xxxxx

崩溃log如下：
Connecting to 192.168.4.1:80

==== Starting Session ====
Traceback (most recent call last):
  File "esp_prov.py", line 426, in
    if not establish_session(obj_transport, obj_security):
  File "esp_prov.py", line 168, in establish_session
    request = sec.security_session(response)
  File "/home/jyb/esp/esp-idf/tools/esp_prov/security/security1.py", line 68, in security1_session
    return self.setup0_request()
  File "/home/jyb/esp/esp-idf/tools/esp_prov/security/security1.py", line 100, in setup0_request
    self.__generate_key()
  File "/home/jyb/esp/esp-idf/tools/esp_prov/security/security1.py", line 86, in __generate_key
    encoding=serialization.Encoding.Raw,
  File "/usr/lib/python3.8/enum.py", line 384, in __getattr__
    raise AttributeError(name) from None
AttributeError: Raw

麻烦大佬们帮忙看看是为什么？找了好久都没解决。