Unable to mkserve meshplot example with current latest anaconda version

[MikeLemo1]

I'm trying to run this example to view a 3D model in a webpage and I'm getting this error:

(base) C:\MyFolder\Documentation\3D_WebViewer_DOC\meshplot>mkdocs serve
INFO - DeprecationWarning: Jupyter is migrating its paths to use standard platformdirs
given by the platformdirs library. To remove this warning and
see the appropriate new directories, set the environment variable
JUPYTER_PLATFORM_DIRS=1 and then run jupyter --paths.
The use of platformdirs will be the default in jupyter_core v6
File "C:\Anaconda3\lib\site-packages\jupyter_core\utils_init_.py", line 89, in deprecation
warnings.warn(message, DeprecationWarning, stacklevel=stacklevel + 1)
File "C:\Anaconda3\lib\site-packages\jupyter_client\connect.py", line 27, in
from jupyter_core.paths import jupyter_data_dir
INFO - DeprecationWarning: Support for bleach <5 will be removed in a future version of nbconvert
File "C:\Anaconda3\lib\site-packages\nbconvert\filters\strings.py", line 23, in
from nbconvert.preprocessors.sanitize import _get_default_css_sanitizer
File "C:\Anaconda3\lib\site-packages\nbconvert\preprocessors\sanitize.py", line 30, in
warnings.warn(
INFO - Building documentation...
INFO - DeprecationWarning: 5.x style template file passed 'C:\Anaconda3\lib\site-packages\mknotebooks\templates\custom_markdown.tpl'.
Use --template-name for the template directory with a index..j2 file and/or --template-file to denote a different
template.
File "C:\Anaconda3\lib\site-packages\traitlets\traitlets.py", line 1560, in _notify_observers
c(event)
File "C:\Anaconda3\lib\site-packages\nbconvert\exporters\templateexporter.py", line 239, in _template_file_changed
warnings.warn(
INFO - DeprecationWarning: Passing unrecognized arguments to
super(HTMLExporter).init(template_path=['C:\Anaconda3\lib\site-packages\mknotebooks\templates',
'C:\Users\mikes\AppData\Roaming\jupyter\nbconvert\templates\base',
'C:\Users\mikes\AppData\Roaming\Python\share\jupyter\nbconvert\templates\base',
'C:\Anaconda3\share\jupyter\nbconvert\templates\base', 'C:\ProgramData\jupyter\nbconvert\templates\base']).
object.init() takes exactly one argument (the instance to initialize)
This is deprecated in traitlets 4.2.This error will be raised in a future release of traitlets.
File "C:\Anaconda3\lib\site-packages\traitlets\config\configurable.py", line 86, in init
super().init(**kwargs)
File "C:\Anaconda3\lib\site-packages\traitlets\traitlets.py", line 1373, in init
warn(
INFO - Cleaning site directory
INFO - DeprecationWarning: relax_add_props kwargs of validate has been deprecated for security
reasons, and will be removed soon.

                Please explicitly use the `n_changes, new_notebook = nbformat.validator.normalize(old_notebook, ...)` if you wish to
                normalise your notebook. `normalize` is available since nbformat 5.5.0


          File "C:\Anaconda3\lib\site-packages\nbformat\validator.py", line 381, in _dep_warn
            warnings.warn(
          File "C:\Anaconda3\lib\site-packages\nbconvert\exporters\exporter.py", line 321, in
            nbformat.validate(nbc, relax_add_props=True)

INFO - DeprecationWarning: There is no current event loop
File "C:\Anaconda3\lib\site-packages\nbclient\util.py", line 47, in just_run
loop = asyncio.get_event_loop()
File "C:\Anaconda3\lib\asyncio\events.py", line 666, in get_event_loop
warnings.warn('There is no current event loop',
INFO - RuntimeWarning: Proactor event loop does not implement add_reader family of methods required for zmq. Registering an
additional selector thread for add_reader support via tornado. Use
asyncio.set_event_loop_policy(WindowsSelectorEventLoopPolicy()) to avoid this warning.
File "C:\Anaconda3\lib\site-packages\zmq\asyncio.py", line 58, in _get_selector_windows
warnings.warn(
File "C:\Anaconda3\lib\site-packages\zmq_future.py", line 679, in
self._get_loop()
INFO - DeprecationWarning: relax_add_props kwargs of validate has been deprecated for security
reasons, and will be removed soon.

                Please explicitly use the `n_changes, new_notebook = nbformat.validator.normalize(old_notebook, ...)` if you wish to
                normalise your notebook. `normalize` is available since nbformat 5.5.0


          File "C:\Anaconda3\lib\site-packages\nbformat\validator.py", line 381, in _dep_warn
            warnings.warn(
          File "C:\Anaconda3\lib\site-packages\nbconvert\exporters\exporter.py", line 321, in
            nbformat.validate(nbc, relax_add_props=True)

WARNING - Path 'css\ansi-colours.css' uses OS-specific separator ''. That will be unsupported in a future release. Please change it to
'/'.
WARNING - Path 'css\jupyter-cells.css' uses OS-specific separator ''. That will be unsupported in a future release. Please change it to
'/'.
WARNING - Path 'css\pandas-dataframe.css' uses OS-specific separator ''. That will be unsupported in a future release. Please change it
to '/'.
Traceback (most recent call last):
File "C:\Anaconda3\lib\runpy.py", line 196, in _run_module_as_main
return _run_code(code, main_globals, None,
File "C:\Anaconda3\lib\runpy.py", line 86, in run_code
exec(code, run_globals)
File "C:\Anaconda3\Scripts\mkdocs.exe_main.py", line 7, in
File "C:\Anaconda3\lib\site-packages\click\core.py", line 1128, in call
return self.main(*args, **kwargs)
File "C:\Anaconda3\lib\site-packages\click\core.py", line 1053, in main
rv = self.invoke(ctx)
File "C:\Anaconda3\lib\site-packages\click\core.py", line 1659, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "C:\Anaconda3\lib\site-packages\click\core.py", line 1395, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "C:\Anaconda3\lib\site-packages\click\core.py", line 754, in invoke
return _callback(*args, **kwargs)
File "C:\Anaconda3\lib\site-packages\mkdocs_main.py", line 234, in serve_command
serve.serve(dev_addr=dev_addr, livereload=livereload, watch=watch, **kwargs)
File "C:\Anaconda3\lib\site-packages\mkdocs\commands\serve.py", line 83, in serve
builder(config)
File "C:\Anaconda3\lib\site-packages\mkdocs\commands\serve.py", line 76, in builder
build(config, live_server=live_server, dirty=dirty)
File "C:\Anaconda3\lib\site-packages\mkdocs\commands\build.py", line 320, in build
_build_theme_template(template, env, files, config, nav)
File "C:\Anaconda3\lib\site-packages\mkdocs\commands\build.py", line 118, in _build_theme_template
output = _build_template(template_name, template, files, config, nav)
File "C:\Anaconda3\lib\site-packages\mkdocs\commands\build.py", line 97, in build_template
output = template.render(context)
File "C:\Anaconda3\lib\site-packages\jinja2\environment.py", line 1301, in render
self.environment.handle_exception()
File "C:\Anaconda3\lib\site-packages\jinja2\environment.py", line 936, in handle_exception
raise rewrite_traceback_stack(source=source)
File "C:\Anaconda3\lib\site-packages\material\404.html", line 4, in top-level template code
{% extends "main.html" %}
File "C:\Anaconda3\lib\site-packages\material\main.html", line 4, in top-level template code
{% extends "base.html" %}
File "C:\Anaconda3\lib\site-packages\material\base.html", line 134, in top-level template code
{% block header %}
File "C:\Anaconda3\lib\site-packages\material\base.html", line 135, in block 'header'
{% include "partials/header.html" %}
File "C:\Anaconda3\lib\site-packages\material\partials\header.html", line 13, in top-level template code
{% include "partials/logo.html" %}
File "C:\Anaconda3\lib\site-packages\material\partials\logo.html", line 5, in top-level template code

File "C:\Anaconda3\lib\site-packages\mkdocs\utils\filters.py", line 14, in url_filter
return normalize_url(value, page=context['page'], base=context['base_url'])
File "C:\Anaconda3\lib\site-packages\mkdocs\utils_init.py", line 300, in normalize_url
path, is_abs = _get_norm_url(path)
TypeError: unhashable type: 'dict'

Are the libraries set of this example still relevant?