Color picker is broken (from Network.show_buttons())

[YouGuessedMyName]

To reproduce, run the following in a jupyter notebook (example taken from the documentation):

from pyvis.network import Network
import networkx as nx

g = Network(notebook=True)

g.from_nx(nx.florentine_families_graph())
g.show_buttons(filter_=['nodes'])

g.show("ex.html")

Click on the color picker (under nodes>color>background), select apply.

Expected behavior: The background color of the nodes changes.
Actual behavior: The color picker goes blank and nothing changes in the graph.

I have tried it on Windows 10 and Ubuntu 24 and in python 3.12 and 3.7, both in notebook and stand-alone mode.

I don't know if this is a pyvis problem or a VisJs problem, but the devs should probably look into it.