ImportError: cannot import name 'merge' from 'keras.layers

This error occurs when you try to import the 'merge' function from the 'keras.layers' module, but it cannot be found. This is because the 'merge' function has been removed from Keras since version 2.0.0 and has been replaced with 'concatenate' or 'add' functions.

To fix this error, you need to replace the 'merge' function with the appropriate function, depending on your use case. For example, if you want to concatenate two layers, you can use the 'concatenate' function like this:

from keras.layers import concatenate

merged_layer = concatenate([layer1, layer2])

If you want to add two layers, you can use the 'add' function like this:

from keras.layers import add

merged_layer = add([layer1, layer2])

Make sure to update your code to use the correct function to avoid this error.