Deployment in docker fails with cloudpickle error

[kielnino]

Hi, I have set up prefect 2.6.7 in Windows (Python 3.10.5). I try to run the example flow from the tutorial inside a custom docker-container which I set up based on the official prefecthq/prefect:2.6.7-python3.10 image.

But when I run the deyploment I get an error from cloudpickle:

09:23:05.272 | INFO    | prefect.agent - Submitting flow run 
'eb8649b6-be2b-41b3-95f7-40635b855e80'
09:23:06.381 | INFO    | prefect.infrastructure.docker-container - Creating Docker    
container 'faithful-dodo'...
09:23:06.570 | INFO    | prefect.infrastructure.docker-container - Docker container   
'faithful-dodo' has status 'created'
09:23:07.191 | INFO    | prefect.agent - Completed submission of flow run 
'eb8649b6-be2b-41b3-95f7-40635b855e80'
09:23:07.604 | INFO    | prefect.infrastructure.docker-container - Docker container   
'faithful-dodo' has status 'running'
Traceback (most recent call last):
  File "/usr/local/lib/python3.10/runpy.py", line 187, in _run_module_as_main
    mod_name, mod_spec, code = _get_module_details(mod_name, _Error)
  File "/usr/local/lib/python3.10/runpy.py", line 110, in _get_module_details
    __import__(pkg_name)
  File "/usr/local/lib/python3.10/site-packages/prefect/__init__.py", line 24, in <module>
    from prefect.states import State
  File "/usr/local/lib/python3.10/site-packages/prefect/states.py", line 14, in <module>
    from prefect.deprecated.data_documents import (
  File "/usr/local/lib/python3.10/site-packages/prefect/deprecated/data_documents.py", line 17, in <module>
    import cloudpickle
  File "/usr/local/lib/python3.10/site-packages/cloudpickle/__init__.py", line 3, in <module>
    from cloudpickle.cloudpickle import *
  File "/usr/local/lib/python3.10/site-packages/cloudpickle/cloudpickle.py", line 145, in <module>
    _cell_set_template_code = _make_cell_set_template_code()
  File "/usr/local/lib/python3.10/site-packages/cloudpickle/cloudpickle.py", line 126, in _make_cell_set_template_code
    return types.CodeType(
TypeError: 'bytes' object cannot be interpreted as an integer
09:23:08.191 | INFO    | prefect.infrastructure.docker-container - Docker container   
'faithful-dodo' has status 'exited'
09:23:08.246 | INFO    | prefect.infrastructure.docker-container - Docker container   
'faithful-dodo' has status 'exited'

I suspect the problem to be with the transfer of the flow-code from the agent (running on windows) to the python-runtime inside the docker container. Can anyone help me to debug this issue?