Process Error when using julia in python

Reproduce el fallo de importación con Julia 1.4.1 y Python 3.8.10 en Ubuntu 20.04 bajo WSL2. Empieza por julia/install.jl, julia/core.py y julia/juliainfo.py; después, consulta la página de resolución de problemas de PyJulia sobre la advertencia reportada de libpython. Se considera terminado cuando se haya identificado la causa de la salida distinta de cero del subproceso de Julia y se haya documentado una solución verificada.

Hello together,
I want to use the DifferentialEquations julia module in python via PyJulia.
So I tried to get julia and PyJulia running.
I have installed Julia versions 1.4.1 and Python version 3.8.10.
But when I try to use any julia module, for example with the following code:

import julia
julia.install()
from julia import Base

I always get the following log-output with error message:

[ Info: Julia version info
Julia Version 1.4.1
Platform Info:
  OS: Linux (x86_64-linux-gnu)
      Ubuntu 20.04.3 LTS
  uname: Linux 5.10.16.3-microsoft-standard-WSL2 #1 SMP Fri Apr 2 22:23:49 UTC 2021 x86_64 x86_64
  CPU: Intel(R) Core(TM) i7-10510U CPU @ 1.80GHz: 
              speed         user         nice          sys         idle          irq
       #1  2304 MHz      11102 s        109 s       2904 s    1807437 s          0 s
       #2  2304 MHz      10488 s         21 s       2898 s    1698775 s          0 s
       #3  2304 MHz      12425 s         77 s       3045 s    1806027 s          0 s
       #4  2304 MHz       7958 s        137 s       2933 s    1701791 s          0 s
       #5  2304 MHz       7714 s         93 s       2768 s    1701425 s          0 s
       #6  2304 MHz       4788 s         99 s       2038 s    1815790 s          0 s
       #7  2304 MHz      10981 s         65 s       3585 s    1697422 s          0 s
       #8  2304 MHz       5493 s         25 s       2182 s    1815091 s          0 s
       
  Memory: 7.670402526855469 GB (4687.16015625 MB free)
  Uptime: 19332.0 sec
  Load Avg:  0.15283203125  0.2890625  0.91845703125
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-8.0.1 (ORCJIT, skylake)
Environment:
  HOME = /home/vinc777
  TERM = xterm-color
  PATH = /bin:/home/vinc777/.vscode-server/bin/dfd34e8260c270da74b5c2d86d61aee4b6d56977/bin/remote-cli:/home/vinc777/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/lib/wsl/lib:/mnt/c/Program Files/copasi.org/COPASI 4.34.251/bin:/mnt/c/WINDOWS/system32:/mnt/c/WINDOWS:/mnt/c/WINDOWS/System32/Wbem:/mnt/c/WINDOWS/System32/WindowsPowerShell/v1.0/:/mnt/c/WINDOWS/System32/OpenSSH/:/mnt/c/Program Files/MATLAB/R2020b/bin:/mnt/c/Program Files/Git/cmd:/mnt/c/Program Files/TortoiseSVN/bin:/mnt/c/Users/User/AppData/Local/Microsoft/WindowsApps:/mnt/c/Users/User/AppData/Local/Programs/MiKTeX/miktex/bin/x64/:/mnt/c/Users/User/AppData/Local/GitHubDesktop/bin:/mnt/c/Users/User/AppData/Local/Programs/Microsoft VS Code/bin:/snap/bin
[ Info: Julia executable: /usr/bin/julia
[ Info: Trying to import PyCall...
┌ Warning: PyCall is already installed.  However, you may have trouble using
│ this Python executable because it is statically linked to libpython.
│ 
│ For more information, see:
│     [https://pyjulia.readthedocs.io/en/latest/troubleshooting.html]()
│ 
│ Python executable:
│     /bin/python3
│ Julia executable:
│     /usr/bin/julia
└ @ Main ~/.local/lib/python3.8/site-packages/julia/install.jl:90
---------------------------------------------------------------------------
CalledProcessError                        Traceback (most recent call last)
/home/vinc777/masterthesis/two_variant_model/pyjulia/pyjulia.ipynb Cell [1](vscode-notebook-cell://wsl%2Bubuntu/home/vinc777/masterthesis/two_variant_model/pyjulia/pyjulia.ipynb#ch0000000vscode-remote?line=0)' in <module>
      1[ import julia
      ]()[2](vscode-notebook-cell://wsl%2Bubuntu/home/vinc777/masterthesis/two_variant_model/pyjulia/pyjulia.ipynb#ch0000000vscode-remote?line=1)[ julia.install()
----> ]()[3](vscode-notebook-cell://wsl%2Bubuntu/home/vinc777/masterthesis/two_variant_model/pyjulia/pyjulia.ipynb#ch0000000vscode-remote?line=2)[ from julia import Base

File <frozen importlib._bootstrap>:991, in _find_and_load(name, import_)

File <frozen importlib._bootstrap>:975, in _find_and_load_unlocked(name, import_)

File <frozen importlib._bootstrap>:655, in _load_unlocked(spec)

File <frozen importlib._bootstrap>:618, in _load_backward_compatible(spec)

File ~/.local/lib/python3.8/site-packages/julia/core.py:248, in JuliaModuleLoader.load_module(self, fullname)
    ]()[245](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/core.py?line=244)[ if juliapath == 'Main':
    ]()[246](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/core.py?line=245)[     return sys.modules.setdefault(fullname,
    ]()[247](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/core.py?line=246)[                                   JuliaMainModule(self, fullname))
--> ]()[248](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/core.py?line=247)[ elif self.julia.isafunction(juliapath):
    ]()[249](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/core.py?line=248)[     return self.julia.eval(juliapath)
    ]()[251](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/core.py?line=250)[ try:

File ~/.local/lib/python3.8/site-packages/julia/core.py:239, in JuliaModuleLoader.julia(self)
    ]()[237](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/core.py?line=236)[ @property
    ]()[238](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/core.py?line=237)[ def julia(self):
--> ]()[239](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/core.py?line=238)[     self.__class__.julia = julia = Julia()
    ]()[240](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/core.py?line=239)[     return julia

File ~/.local/lib/python3.8/site-packages/julia/core.py:468, in Julia.__init__(self, init_julia, jl_init_path, runtime, jl_runtime_path, debug, **julia_options)
    ]()[466](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/core.py?line=465)[     self.api = get_libjulia()
    ]()[467](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/core.py?line=466)[ elif init_julia:
--> ]()[468](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/core.py?line=467)[     jlinfo = JuliaInfo.load(runtime)
    ]()[469](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/core.py?line=468)[     if jlinfo.version_info < (0, 7):
    ]()[470](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/core.py?line=469)[         raise RuntimeError("PyJulia does not support Julia < 0.7 anymore")

File ~/.local/lib/python3.8/site-packages/julia/juliainfo.py:87, in JuliaInfo.load(cls, julia, **popen_kwargs)
     ]()[83](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/juliainfo.py?line=82)[         raise subprocess.CalledProcessError(
     ]()[84](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/juliainfo.py?line=83)[             retcode, [julia, "-e", "..."], output
     ]()[85](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/juliainfo.py?line=84)[         )
     ]()[86](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/juliainfo.py?line=85)[     else:
---> ]()[87](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/juliainfo.py?line=86)[         raise subprocess.CalledProcessError(
     ]()[88](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/juliainfo.py?line=87)[             retcode, [julia, "-e", "..."], stdout, stderr
     ]()[89](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/juliainfo.py?line=88)[         )
     ]()[91](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/juliainfo.py?line=90)[ stderr = stderr.strip()
     ]()[92](file:///home/vinc777/.local/lib/python3.8/site-packages/julia/juliainfo.py?line=91)[ if stderr:

CalledProcessError: Command '['julia', '-e', '...']' returned non-zero exit status 1.]()

I already tried reinstalling julia and PyCall and some suggested workarounds for similar problems but it nothing helped.

Maybe someone knows what the problem is.

Thanks
Vincent