Hi @NaeemS, it's hard to say given how uninformative the error is. I will try to give it a go next week but maybe you can help me by answering a few questions:

• Can you paste the exact line of code that trigger the error?
• Does the sklearn model also use the Feature Store? Is the only difference in the library used (pyspark vs sklearn)?
• Is your Online Feature Store correctly configured with the right credentials to retrieve the latest feature set?
• What happens if you remove the

  databricks-feature-lookup==0.*​

  from your requirements file?