Problem with vgg.fit()

Im trying to build an image classifier for https://www.hackerearth.com/challenge/competitive/deep-learning-challenge-1/
Basically, there are 3000+ images over 26 categories

When I run, vgg.fit() , i get the following error:

ValueError: Error when checking model target: expected dense_4 to have shape (None, 26) but got array with shape (128, 25)

any thoughts/ anyone has faced similar?

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I’m facing the same issue, but with lessons one notebook ‘Dogs vs Cats Redux’, i don’t know what i’m doing wrong, have you been able to solve yours ?