Naive bayes classifier error

Hey Guys,
I am getting an error when I try to build a Naive bayes classifier with Lunchbox ML

Edit : ** please ignore the colored nodes at the bottom,It was a reference i used.

It says the key is not present in the dictonary what does that mean…?
It tries to match the input with the training data?
Is’nt it suppose to calculate the probability of classification and classify my input with the training data?

You’re running this on Dynamo 2.0 and the package hasn’t been updated for that yet. Try it in a 1.x version instead.

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oh Alright…! thanks…!