In order to fix errors using Python 3.11.x and above while preserving ability for Python 3.10.x and below to still work correctly, example error from another workbench:
File "/usr/lib/python3.11/json/encoder.py", line 180, in default
raise TypeError(f'Object of type {o.__class__.__name__} '
<class 'TypeError'>: Object of type FeaturePython is not JSON serializable
17:04:02 PropertyPythonObject::toString(): failed for <class 'SheetMetalCmd.SMViewProviderFlat'>
17:04:02 pyException: Traceback (most recent call last):
File "/usr/lib/python3.11/json/__init__.py", line 231, in dumps
return _default_encoder.encode(obj)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.11/json/encoder.py", line 200, in encode
chunks = self.iterencode(o, _one_shot=True)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.11/json/encoder.py", line 258, in iterencode
return _iterencode(o, 0)
^^^^^^^^^^^^^^^^^
In order to fix errors using Python 3.11.x and above while preserving ability for Python 3.10.x and below to still work correctly, example error from another workbench:
Root Cause is https://github.com/FreeCAD/FreeCAD/commit/fbe2fef