seg fault running simple python script with mpi (5.9.0 RC4)

I downloaded release candidate binary for mac os (ParaView-5.9.0-RC4-MPI-OSX10.13-Python3.8-64bit.dmg), and then tried to run a simple python script, and it resulted in a segmentation fault.

Here is the pvpython/pvbatch script:

import paraview.simple as simple

simple.servermanager.Connect("localhost")
print("connected")
cone = simple.Cone()
print("cone created")

Here are the steps to reproduce:

Start the server

/Applications/ParaView-5.9.0-RC4.app/Contents/bin/pvserver --force-offscreen-rendering

Start the client

/Applications/ParaView-5.9.0-RC4.app/Contents/bin/pvbatch ./client_script.py

Here's the output from the client:

Could not find platform dependent libraries <exec_prefix>
Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>]
connected

Loguru caught a signal: SIGSEGV
Stack trace:
24                 0x2 28  ???                                 0x0000000000000002 0x0 + 2
23      0x7fff721b2cc9 start + 1
22         0x10fc99742 ParaViewPython::Run(int, int, char**) + 818
21         0x11026a91e vtkPythonInterpreter::PyMain(int, char**) + 558
20         0x111e2eb9b Py_Main + 43
19         0x111e2ed46 pymain_main + 406
18         0x111e2e77a Py_RunMain + 2234
17         0x111e0e76f PyRun_SimpleFileExFlags + 271
16         0x111e0f373 PyRun_FileExFlags + 291
15         0x111dbc1f0 PyEval_EvalCode + 48
14         0x111dc8223 _PyEval_EvalCodeWithName + 3459
13         0x111dc38bd _PyEval_EvalFrameDefault + 30253
12         0x111dc7092 call_function + 354
11         0x111ce056e _PyFunction_Vectorcall + 254
10         0x111dc8223 _PyEval_EvalCodeWithName + 3459
9          0x111dc38bd _PyEval_EvalFrameDefault + 30253
8          0x111dc7092 call_function + 354
7          0x111ce2f3b method_vectorcall + 171
6          0x111ce056e _PyFunction_Vectorcall + 254
5          0x111dc8223 _PyEval_EvalCodeWithName + 3459
4          0x111dc3e04 _PyEval_EvalFrameDefault + 31604
3          0x111ce00b3 cfunction_call_varargs + 323
2          0x12ac450b8 PyvtkSMParaViewPipelineController_RegisterPipelineProxy(_object*, _object*) + 504
1          0x10fd52c6a vtkSMParaViewPipelineController::RegisterPipelineProxy(vtkSMProxy*, char const*) + 442
0                  0x4 4   ???                                 0x0000000000000004 0x0 + 4
(   8.031s) [pvbatch         ]                       :0     FATL| Signal: SIGSEGV
Segmentation fault: 11

Here's the output from the server:

Waiting for client...
Connection URL: cs://Scotts-MacBook-Pro-2.local:11111
Accepting connection(s): Scotts-MacBook-Pro-2.local:11111
Client connected.
(  22.205s) [pvserver        ]vtkSocketCommunicator.c:781    ERR| vtkSocketCommunicator (0x7fb044e19d80): Could not receive tag. 1
(  22.205s) [pvserver        ]vtkTCPNetworkAccessMana:297    ERR| vtkTCPNetworkAccessManager (0x7fb044d117a0): Some error in socket processing.
(  22.205s) [pvserver        ]          vtkSocket.cxx:532    ERR| vtkClientSocket (0x7fb044e171b0): Socket error in call to send. Broken pipe.
(  22.205s) [pvserver        ]          vtkSocket.cxx:532    ERR| vtkClientSocket (0x7fb044e171b0): Socket error in call to send. Broken pipe.
...
(  22.319s) [pvserver        ]          vtkSocket.cxx:532    ERR| vtkClientSocket (0x7fb044e171b0): Socket error in call to send. Broken pipe.
Segmentation fault: 11

For brevity, in the server output above, I omitted many, many of those Socket error in call to send. Broken pipe. messages in favor of ....