How do I move past a “Bitbake crash” when building in Yocto Toaster?

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I’m following the instructions in Chapter 3 (“Using Toaster to Bake an Image”) of Embedded Linux Development Using Yocto Project – Third Edition and after starting Toaster, creating a project, and starting a build I immediately get this error:

Bitbake crash
Traceback (most recent call last):
  File "/home/joe/poky/bitbake/bin/bitbake", line 37, in <module>
    cookerdata.CookerConfiguration()))
  File "/home/joe/poky/bitbake/lib/bb/main.py", line 379, in bitbake_main
    configParams)
  File "/home/joe/poky/bitbake/lib/bb/ui/toasterui.py", line 135, in main
    params.updateToServer(server, os.environ.copy())
  File "/home/joe/poky/bitbake/lib/bb/cookerdata.py", line 73, in updateToServer
    ret, error = server.runCommand(["updateConfig", options, environment, sys.argv])
  File "/usr/lib/python3.6/xmlrpc/client.py", line 1112, in __call__
    return self.__send(self.__name, args)
  File "/usr/lib/python3.6/xmlrpc/client.py", line 1452, in __request
    verbose=self.__verbose
  File "/usr/lib/python3.6/xmlrpc/client.py", line 1154, in request
    return self.single_request(host, handler, request_body, verbose)
  File "/usr/lib/python3.6/xmlrpc/client.py", line 1170, in single_request
    return self.parse_response(resp)
  File "/usr/lib/python3.6/xmlrpc/client.py", line 1342, in parse_response
    return u.close()
  File "/usr/lib/python3.6/xmlrpc/client.py", line 656, in close
    raise Fault(**self._stack[0])
xmlrpc.client.Fault: <Fault 1: "<class 'xml.parsers.expat.ExpatError'>:not well-formed (invalid token): line 183, column 17">

I searched for this error and didn’t see it mentioned anywhere. I’m stuck on what to do next.

Since you likely don’t have access to the book, here is how I brought up Toaster:

  1. git clone https://git.yoctoproject.org/poky -b kirkstone
  2. pip3 install --user -r bitbake/toaster-requirements.txt (from the poky/ directory)
  3. source oe-init-build-env
  4. source toaster start webport=0.0.0.0:8400
  5. Created a new project
  6. Changed the target machine to qemux86-64
  7. Chose the core-image-full-cmdline image and built it

I have successfully completed the same build (bitbake core-image-full-cmdline) from the command-line of the Ubuntu 18.04.6 LTS machine on which I’m running Toaster.

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