Cannot import name 'TilingMethod' from 'toasty'

[OH5000]

I am trying to follow the instruction from https://pywwt.readthedocs.io/en/stable/installation.html#set-up-pywwts-jupyterlab-integration to install WWT.
The way I chose is to install pywwt with conda-forge.
conda install -c conda-forge pywwt is my first input.

The next is to "Set Up pywwt’s JupyterLab Integration"
Second inputs are

pip install wwt-kernel-data-relay # or use conda
jupyter labextension install --no-build @jupyter-widgets/jupyterlab-manager
jupyter labextension install --no-build @wwtelescope/jupyterlab
jupyter lab build

There is no problem before them. But when I start to "Set up the pywwt Jupyter Widget".The problem starts to emerge.

The first command is pip install wwt-kernel-data-relay # or use conda
And I tried the Python commands inside a Jupyter Notebook.
Here is its' output.

Because of this problem, I start the step "Troubleshooting the Jupyter Integration"

I ran jupyter nbextension install --py --sys-prefix pywwt

jupyter nbextension enable --py --sys-prefix pywwt

jupyter nbextension list

The instruction says "These commands should not report any error messages", so I come here and ask for help.

Thank-you.