'wine_quality_<property object at 0x7f6e7366a290>' is not a valid scope name

In the assigment W1 of Advanced Technique Tensorflow. I am not able to compile model because of
‘wine_quality_<property object at 0x7f6e7366a290>’ is not a valid scope name

The file below is jupyter file that have the problem.

[code removed - moderator]

I found a solution. At the metrics at model.compile
tf.keras.metrics.RootMeanSquaredError should have ()
So, instread of
tf.keras.metrics.RootMeanSquaredError need to change to
tf.keras.metrics.RootMeanSquaredError()
Then the error disappear. Thank you.