'I am getting a user code error while running an ensembled based diabetic retinop[athy classification

I am a beginner to build deep learning models. However while building an average ensemble based classification using pretrained models Densenet121 and inceptionv3 for diabetic retinopathy disease I am getting a usercode error as described below: [1]: https://i.stack.imgur.com/Hm30t.png Please help me to try to resolve the error.



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