Error in running

[NazilaPourhaji]

Hello dear professor,
I hope you are doing well.
Thanks for your valuable paper. I ran the code and for this command (third line in below code):

image_encoder = ImageEncoder()
vae=tf.keras.Model(
image_encoder.input,
image_encoder.layers[-1].output,
)
model = StableDiffusion(img_width=512, img_height=512)
blip = None

I received this error:
ValueError: The layer image_encoder has never been called and thus has no defined input.

Please help me to run the code. I really need to run this code. Please guide me.

Thank you very much dear professor.