ValueError

When running python train_autoenc.py --model_dir="../models/autoenc_train", I get this error:
ValueError:
You selected an invalid strategy name: `strategy=None`. It must be either a string or an instance of `pytorch_lightning.strategies.Strategy`. Example choices: auto, ddp, ddp_spawn, deepspeed, ... Find a complete list of options in our documentation at https://lightning.ai

Start with train_autoenc.py and reproduce the reported command to trace where strategy=None is supplied to PyTorch Lightning. Check the relevant configuration or argument handling and verify the command no longer raises the invalid strategy ValueError with an accepted strategy value.

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