Bug located in edb.stackup.export

[ring630]

Before submitting the issue

• [X] I have searched among the existing issues
• [X] I am using a Python virtual environment

Description of the bug

PyEDB ERROR: ATTRIBUTE ERROR on _export_layer_stackup_to_json PyEDB ERROR: 'Material' object has no attribute '_json_format' PyEDB ERROR: File "D:_pycharm_project\pyaedt-examples\venv\lib\site-packages\pyedb\dotnet\edb_core\stackup.py", line 789, in export PyEDB ERROR: return self._export_layer_stackup_to_json(fpath, include_material_with_layer) PyEDB ERROR: File "D:_pycharm_project\pyaedt-examples\venv\lib\site-packages\pyedb\dotnet\edb_core\stackup.py", line 861, in _export_layer_stackup_to_json PyEDB ERROR: Method arguments: PyEDB ERROR: output_file = stk.json

Steps To Reproduce

edbapp.stackup.export("stk.json")

Which Operating System are you using?

Windows

Which Python version are you using?

3.10

Installed packages

all

[ring630]

Update The problem only exist in non grpc mode.