Error: no available Keras back end

How to deal with error: “no available Keras back end”. I am trying to run knime://EXAMPLES/Users/knime/Examples/50_Applications/39_Fraud_Detection/04_Keras_Autoencoder_for_Fraud_Detection_Deployment
no changes to workflow was made by me.
I tried to install Keras again but I got this:

Hi @OlgaI,

the KNIME Keras integration depends on an existing Python installation, which requires certain Python dependencies to be installed. It looks like this is not setup correctly yet. Here you can find a description how you can setup Python for the Keras integration.


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