Hi, I also ran into this error while running the fit( ) method in a cell for Deep Learning 2018 “lesson6-rnn” notebook. I had just done “conda env update” beforehand, so apparently a numpy update has rendered the old code useless. Yesterday, I ran the same notebook without throwing the error, which is the same as yours.
I wish I had an answer for you, Chaouki, but I’m in over my head. I regret doing the update, is all I can say!
Tried following this advice: Unfamiliar Error when Running learn.fit()
Unfortunately, it still throws an error that I won’t bother to describe.