"Error creating widget: could not find model" after reloading notebook

[mflevine]

If I reload a notebook after having run a plot, instead of displaying the plot I just see "Error creating widget: could not find model".

[thomasaarholt]

I believe you mean that if you close and reopen the notebook (in jupyter lab), you get the above error. I can reproduce. There is a discussion in #16 that you can follow. This is essentially a duplicate of that issue.

For others (it's always nice to include the code so that we don't have to type it out like I just did):

%matplotlib ipympl
import matplotlib.pyplot as plt
import numpy as np

t = np.arange(0.0, 2.0, 0.01)
s = 1 + np.sin(2*np.pi*t)
plt.plot(t,s)
plt.show()