Ambari Common Stomp Module AttributeError

Exception in thread StompReceiverThread-1:
Traceback (most recent call last):
  File "/home/peng/Desktop/202309/pythonlab/python3819/lib/python3.8/threading.py", line 932, in _bootstrap_inner
    self.run()
  File "/home/peng/Desktop/202309/pythonlab/python3819/lib/python3.8/threading.py", line 870, in run
    self._target(*self._args, **self._kwargs)
  File "/home/peng/Desktop/projects/ambari/ambari-common/src/main/python/ambari_stomp/transport.py", line 334, in __receiver_loop
    frames = self.__read()
  File "/home/peng/Desktop/projects/ambari/ambari-common/src/main/python/ambari_stomp/transport.py", line 380, in __read
    if c.encode() == b'\x0a' and not self.__recvbuf and not fastbuf.tell():
AttributeError: 'bytes' object has no attribute 'encode' 

export PYTHONPATH=$PYTHONPATH:${your_ambari_common_home}/src/main/python 

bash run.sh  

python3 python/demo1.py test