Error: No module named 'pytorch_lightning.core.lightning'

While running the code after installing the requirements the following error is encountered:

---------------------------------------------------------------------------
ModuleNotFoundError                       Traceback (most recent call last)
Cell In[5], line 7
      5 import numpy as np
      6 import pytorch_lightning as pl
----> 7 import lightly
      8 from loss import BarlowTwinsLoss
     10 from utils import knn_predict, BenchmarkModule

File /opt/conda/envs/cl-ssl-env/lib/python3.9/site-packages/lightly/__init__.py:101
     98     return _prefetch_generator_available
    100 # import core functionalities
--> 101 from lightly.core import train_model_and_embed_images
    102 from lightly.core import train_embedding_model
    103 from lightly.core import embed_images

File /opt/conda/envs/cl-ssl-env/lib/python3.9/site-packages/lightly/core.py:6
      1 """ Contains the core functionality of the lightly Python package. """
      3 # Copyright (c) 2020. Lightly AG and its affiliates.
      4 # All Rights Reserved
----> 6 from lightly.cli.train_cli import _train_cli
      7 from lightly.cli.embed_cli import _embed_cli
      8 from lightly.cli.lightly_cli import _lightly_cli

File /opt/conda/envs/cl-ssl-env/lib/python3.9/site-packages/lightly/cli/__init__.py:9
      1 """ The lightly.cli module provides a console interface
      2     for training self-supervised models, embedding,
      3     and filtering datasets
      4 """
      6 # Copyright (c) 2020. Lightly AG and its affiliates.
      7 # All Rights Reserved
----> 9 from lightly.cli.lightly_cli import lightly_cli
     10 from lightly.cli.train_cli import train_cli
     11 from lightly.cli.embed_cli import embed_cli

File /opt/conda/envs/cl-ssl-env/lib/python3.9/site-packages/lightly/cli/lightly_cli.py:13
      8 # Copyright (c) 2020. Lightly AG and its affiliates.
      9 # All Rights Reserved
     11 import hydra
---> 13 from lightly.cli.train_cli import _train_cli
     14 from lightly.cli.embed_cli import _embed_cli
     15 from lightly.cli.upload_cli import _upload_cli

File /opt/conda/envs/cl-ssl-env/lib/python3.9/site-packages/lightly/cli/train_cli.py:18
     16 from lightly.data import ImageCollateFunction
     17 from lightly.data import LightlyDataset
---> 18 from lightly.embedding import SelfSupervisedEmbedding
     19 from lightly.loss import NTXentLoss
     20 from lightly.models import SimCLR

File /opt/conda/envs/cl-ssl-env/lib/python3.9/site-packages/lightly/embedding/__init__.py:11
      1 """The lightly.embedding module provides trainable embedding strategies.
      2 
      3 The embedding models use a pre-trained ResNet but should be finetuned on each
      4 dataset instance.
      5 
      6 """
      8 # Copyright (c) 2020. Lightly AG and its affiliates.
      9 # All Rights Reserved
---> 11 from lightly.embedding._base import BaseEmbedding
     12 from lightly.embedding.embedding import SelfSupervisedEmbedding

File /opt/conda/envs/cl-ssl-env/lib/python3.9/site-packages/lightly/embedding/_base.py:9
      6 import copy
      8 import pytorch_lightning as pl
----> 9 import pytorch_lightning.core.lightning as lightning
     10 import torch.nn as nn
     12 from lightly.embedding._callback import CustomModelCheckpoint

ModuleNotFoundError: No module named 'pytorch_lightning.core.lightning'

For more information here is the output from

pip list | grep torch

pytorch-lightning                      1.9.5
torch                                  1.13.1
torch-xla                              1.13
torchmetrics                           0.11.4
torchvision                            0.14.1

and

pip list | grep lightly

lightly                                1.0.8
lightly-utils                          0.0.2

IgorSusmelj / barlowtwins

Error: No module named 'pytorch_lightning.core.lightning' #9