Not able to identify the backdoor connection

[SaiAditya2595]

Hello, When I running Dowhy on a bankchurn dataset, I am not able to get any backdoors connections. Can you please suggest me how to address this issue? you find the dataset as well as the Causal Graph here.

I am following the notebook from here. https://github.com/cornelliusyudhawijaya/Churn_Causality_Analysis/blob/main/Causal%20Analysis%20Do%20Why.ipynb