crash in IPP server

[jstucke]

When POSTing to the IPP honeypot server an exception occurs (only seen when re-enabling the logging output of twisted):

Traceback (most recent call last):
  File "/lib/python3.10/site-packages/twisted/protocols/basic.py", line 548, in dataReceived
    why = self.lineReceived(line)
  File "/lib/python3.10/site-packages/twisted/web/http.py", line 2243, in lineReceived
    self.allContentReceived()
  File "/lib/python3.10/site-packages/twisted/web/http.py", line 2369, in allContentReceived
    req.requestReceived(command, path, version)
  File "/lib/python3.10/site-packages/twisted/web/http.py", line 1003, in requestReceived
    self.process()
--- <exception caught here> ---
  File "/lib/python3.10/site-packages/twisted/web/server.py", line 229, in process
    self.render(resrc)
  File "/lib/python3.10/site-packages/twisted/web/server.py", line 294, in render
    body = resrc.render(self)
  File "/lib/python3.10/site-packages/twisted/web/resource.py", line 263, in render
    return m(request)
  File "/lib/python3.10/site-packages/honeypots/ipp_server.py", line 175, in render_POST
    return self.send_response(request, b'\x01\x01\x00\x00')
builtins.AttributeError: 'MainResource' object has no attribute 'send_response'

I'm not really familiar with twisted myself. Could this maybe be a problem caused by migrating to a newer version of twisted?