[Python] Jupyter Notebook not rendering ipywidgets

Instead of rendering the actual widgets, it's just rendering text labels. See screenshot below.

import ipywidgets as widgets
from IPython.display import display

label = widgets.Label(value='Hello!')

display(label)
>>> Label(value='Hello!')




Edit


The above works for me on my local computer, but not on a server. Both are running Python 3.6, jupyter-core==4.6.3

Edit 2


In response to the question by @adhg, here's the output of widgets.InsSlider() (in his question, (s)he had a typo Ins instead of Int)



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