TftpException: Invalid options in buffer

[QGB]

import tftpy


client = tftpy.TftpClient('192.168.0.42', 69, options={'blksize': 8})

In [1014]: client.download('breed.bin','output.bin')
2022-08-24:09:17:49,158 INFO     [TftpContexts.py:389] Sending tftp download request to 192.168.1.3
2022-08-24:09:17:49,171 INFO     [TftpContexts.py:390]     filename -> breed.bin
2022-08-24:09:17:49,171 INFO     [TftpContexts.py:391]     options -> {'blksize': 8}
---------------------------------------------------------------------------
TftpException                             Traceback (most recent call last)
<ipython-input-1014-e736a6ad1e28> in <module>
----> 1 client.download('breed.bin','output.bin')

C:\QGB\Anaconda3\lib\site-packages\tftpy\TftpClient.py in download(self, filename, output, packethook, timeout, retries)
     60                                                  retries=retries,
     61                                                  localip=self.localip)
---> 62         self.context.start()
     63         # Download happens here
     64         self.context.end()

C:\QGB\Anaconda3\lib\site-packages\tftpy\TftpContexts.py in start(self)
    408             try:
    409                 log.debug("State is %s" % self.state)
--> 410                 self.cycle()
    411             except TftpTimeout as err:
    412                 log.error(str(err))

C:\QGB\Anaconda3\lib\site-packages\tftpy\TftpContexts.py in cycle(self)
    181
    182         # Decode it.
--> 183         recvpkt = self.factory.parse(buffer)
    184
    185         # Check for known "connection".

C:\QGB\Anaconda3\lib\site-packages\tftpy\TftpPacketFactory.py in parse(self, buffer)
     35         packet = self.__create(opcode)
     36         packet.buffer = buffer
---> 37         return packet.decode()
     38
     39     def __create(self, opcode):

C:\QGB\Anaconda3\lib\site-packages\tftpy\TftpPacketTypes.py in decode(self)
    467
    468     def decode(self):
--> 469         self.options = self.decode_options(self.buffer[2:])
    470         return self
    471

C:\QGB\Anaconda3\lib\site-packages\tftpy\TftpPacketTypes.py in decode_options(self, buffer)
     77                     length = -1
     78                 else:
---> 79                     raise TftpException("Invalid options in buffer")
     80             length += 1
     81

TftpException: Invalid options in buffer

server: mobaxterm