Lesson 1 - IOPub message rate exceeded

When running this code in the lesson:
from fastai.text.all import *

dls = TextDataLoaders.from_folder(untar_data(URLs.IMDB), valid='test',bs=16)
learn = text_classifier_learner(dls, AWD_LSTM, drop_mult=0.5, metrics=accuracy)
learn.fine_tune(4, 1e-2)

I’m getting valid output (though somewhat slowly~27 minutes per epoch, as opposed to 3 minutes for Jeremy Howard), but after that, I’m getting the following message:
IOPub message rate exceeded.
The notebook server will temporarily stop sending output
to the client in order to avoid crashing it.
To change this limit, set the config variable

Current values:
NotebookApp.iopub_msg_rate_limit=1000.0 (msgs/sec)
NotebookApp.rate_limit_window=3.0 (secs)

Is this something I should do something about, or think about?

I am getting the same error on learn.fine_tune(8)
see image