Issues with ipyleaflet 0.19 in Colab

[osgeokr]

I currently have ipyleaflet 0.19 installed in Colab, but the map is not displaying.
I checked the version with the code below.

import ipyleaflet
print(ipyleaflet.__version__)

I am using geemap, which dependent on ipyleaflet, and I have encountered this error.
For now, I am using the following code to downgrade the version.

!pip install -q ipyleaflet==0.18

[schwehr]

This is a dup of #1192