animate_foragers working inconsistently

[racohn]

In the random_foragers notebook, cell 7:
ft.animate_foragers(
random_foragers_sim, width=600, height=400, plot_rewards=True, point_size=6
)
only works some of the time for basic animation. more complicated ones in other notebooks seem more reliable. running on mac in chrome. I ensured graphviz was installed locally, which seemed to help previously, but now it's back to not working. I will update if I come across any reasoning behind when it works or not.