Multi digit recognition

Hello, I’m trying to build a multi-digit recognition model with tensorflow 2.0 and SVHN dataset. I built the model with the multiple outputs using functional API, but when I try to fit it I I get the following error:

code that produces the error is : = train, y = [tr_digit1, tr_digit2, tr_digit3, tr_digit4, tr_digit5, train_length] , shuffle=True, epochs = 3)

Thank you in advance