How to visualize and compare input data, ground truth and results in TensorBoard?

### Checklist

- [X] I have searched for [similar issues](https://github.com/isl-org/Open3D-ML/issues).
- [X] I have tested with the [latest development wheel](http://www.open3d.org/docs/latest/getting_started.html#development-version-pip).
- [X] I have checked the [release documentation](http://www.open3d.org/docs/release/) and the [latest documentation](http://www.open3d.org/docs/latest/) (for `master` branch).

### My Question

I have got the summary files include **msgpack** , but when I run `tensorboard --logdir mypath` and chose the colum of **OPEN3D**, an error shows as follow:
/home/johnny.pan/anaconda3/envs/open3d/lib/python3.6/site-packages/werkzeug/filesystem.py:53: **BrokenFilesystemWarning: Detected a misconfigured UNIX filesystem: Will use UTF-8 as filesystem encoding instead of 'ascii'
BrokenFilesystemWarning,**
E0222 12:00:51.545484 139888637277952 _internal.py:225] Error on request:
Traceback (most recent call last):
File "/home/johnny.pan/anaconda3/envs/open3d/lib/python3.6/site-packages/werkzeug/serving.py", line 320, in run_wsgi
execute(self.server.app)
File "/home/johnny.pan/anaconda3/envs/open3d/lib/python3.6/site-packages/werkzeug/serving.py", line 309, in execute
application_iter = app(environ, start_response)
File "/home/johnny.pan/anaconda3/envs/open3d/lib/python3.6/site-packages/tensorboard/backend/application.py", line 525, in __call__
return self._app(environ, start_response)
File "/home/johnny.pan/anaconda3/envs/open3d/lib/python3.6/site-packages/tensorboard/backend/application.py", line 566, in wrapper
return wsgi_app(environ, start_response)
File "/home/johnny.pan/anaconda3/envs/open3d/lib/python3.6/site-packages/tensorboard/backend/security_validator.py", line 77, in __call__
return self._application(environ, start_response_proxy)
File "/home/johnny.pan/anaconda3/envs/open3d/lib/python3.6/site-packages/tensorboard/backend/path_prefix.py", line 68, in __call__
return self._application(environ, start_response)
File "/home/johnny.pan/anaconda3/envs/open3d/lib/python3.6/site-packages/tensorboard/backend/experiment_id.py", line 73, in __call__
return self._application(environ, start_response)
File "/home/johnny.pan/anaconda3/envs/open3d/lib/python3.6/site-packages/tensorboard/backend/empty_path_redirect.py", line 43, in __call__
return self._application(environ, start_response)
File "/home/johnny.pan/anaconda3/envs/open3d/lib/python3.6/site-packages/tensorboard/backend/application.py", line 589, in wrapper
return wsgi_app(environ, start_response)
File "/home/johnny.pan/anaconda3/envs/open3d/lib/python3.6/site-packages/tensorboard/backend/application.py", line 548, in _route_request
return self.exact_routes[clean_path](environ, start_response)
File "/home/johnny.pan/anaconda3/envs/open3d/lib/python3.6/site-packages/werkzeug/wrappers/request.py", line 206, in application
resp = f(*args[:-2] + (request,))
File "/home/johnny.pan/anaconda3/envs/open3d/lib/python3.6/site-packages/open3d/visualization/tensorboard_plugin/plugin.py", line 799, in _serve_js
return werkzeug.Response(infile.read(),
File "/home/johnny.pan/anaconda3/envs/open3d/lib/python3.6/encodings/ascii.py", line 26, in decode
return codecs.ascii_decode(input, self.errors)[0]
**UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 16677: ordinal not in range(128)**