Meraki Robust Transformer having issues and not loading data into CI table

[mullala]

I am running the Meraki Data Source - SG-MerakiDevices, and once the data gets loaded into the Data Source table, the Robust Transformer is failing and throwing the following error which I attached

Do we need to change anything in the Robust Transformer to get it to work? If so, what modifications are required?
Below are the references images for Datasource and Robust Transformer