Invalid notebook application/vnd.jupyter.widget-state+json' key is missing from json

There was an **error** rendering the Notebook **Clas-Decision-Trees-drug-py-v1.ipynb**

<img width="1087" height="424" alt="Image" src="https://github.com/user-attachments/assets/dfe08215-5435-43b9-90ea-5b0cc7b4d69d" />