Help with my code from C5_W4_A1_TRANSFORMER_SUBCLASS_V1

Hello, sorry, could you please be so kind as to help me with part UNQ_7 of the code? I’m getting the following error and I have no idea how to solve it anymore:

Please click my name and message your notebook as an attachment.

Thank you for responding, I finally managed to solve it, I was missing a number. Thank you very much for responding.

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