ModuleNotFoundError: pydantic_core._pydantic_core in windows

[MaheshFXTD]

Trying to install in windows but facing error.
I am stuck at step4) Varify
uv run python -c "import mcp.server.fastmcp; print('MCP is installed!')"
(.venv) PS C:\Users\mahes\OneDrive\Documents\houdini19.5\scripts\python\houdinimcp> uv run python -c "import mcp.server.fastmcp; print('MCP is installed!')"
ModuleNotFoundError: No module named 'pydantic_core._pydantic_core'

Another issue from claude while setting up configuration.
MCP Houdini: Server disconnected. For troubleshooting guidance, please visit out debugging documentation.
Blender one works fine.

[Emiime2]

Hello! I'm experiencing the exact same error.

Despite several searches, Python updates, and testing several library versions, I still can't get the server to work.

Did you manage to resolve your problem?

Thanks in advance !

[Reathor765]

This is the error I get as well. I have the blender-mcp working with Claude and VScode/cursor.
This may not make a difference, but I am using Houdini Apprentice 20.5. All references during install were changed to reflect.