AttributeError while running SemanticSegmentation training

Checklist

[X] I have searched for similar issues.
[X] I have tested with the latest development wheel.
[X] I have checked the release documentation and the latest documentation (for master branch).

Describe the issue

when I try to run the default code for semantic segmentation I get:

INFO - 2023-05-19 21:54:52,178 - semantic_segmentation - Initializing from scratch. Traceback (most recent call last): File "main.py", line 13, in pipeline.run_train() File ".local/lib/python3.8/site-packages/open3d/_ml3d/torch/pipelines/semantic_segmentation.py", line 354, in run_train self.save_config(writer) File "local/lib/python3.8/site-packages/open3d/_ml3d/torch/pipelines/semantic_segmentation.py", line 559, in save_config writer.add_text("Description/Open3D-ML", self.cfg_tb['readme'], 0) AttributeError: 'SemanticSegmentation' object has no attribute 'cfg_tb'

Steps to reproduce the bug

import os
import open3d.ml as _ml3d
import open3d.ml.torch as ml3d

dataset = ml3d.datasets.SemanticKITTI(dataset_path='data/kitti', use_cache=True)

# create the model with random initialization.
model = ml3d.models.RandLANet()

pipeline = ml3d.pipelines.SemanticSegmentation(model=model, dataset=dataset, max_epoch=100)

# prints training progress in the console.
pipeline.run_train()

Error message

Expected behavior

No response

Open3D, Python and System information

- Operating system: Ubuntu 20.04
- Python version: Python 3.8 
- Open3D version: 0.12.0
- System type: x84
- Is this remote workstation?: yes
- How did you install Open3D?: pip

Additional information

No response

isl-org / Open3D-ML