AttributeError: 'NoneType' object has no attribute 'detach'

[Heathen]

While trying to train a hand TI:

Error completing request
Arguments: ('Handout', 114514, '0.003', 1, 'C:\AIStuff\Training\Hand', 'dream_artist', 512, 512, 8000, 100, 500, 'C:\AIStuff\autowebui\stable-diffusion-webui\textual_inversion_templates\hand.txt', False, True, 'close-up photo of a woman waving, Handout', 'Handout-neg', 20, 0, 7, 3468537928.0, 512, 512, '1.0-4.0:cos', '', True, True, False, 1, 1, 1.0, 25.0, 1.0, 25.0, 0.9, 0.999, False, 1, False, '0.000005') {}
Traceback (most recent call last):
File "C:\AIStuff\autowebui\stable-diffusion-webui\modules\call_queue.py", line 45, in f
res = list(func(*args, **kwargs))
File "C:\AIStuff\autowebui\stable-diffusion-webui\modules\call_queue.py", line 28, in f
res = func(*args, **kwargs)
File "C:\AIStuff\autowebui\stable-diffusion-webui\extensions\DreamArtist-sd-webui-extension\scripts\dream_artist\ui.py", line 32, in train_embedding
embedding, filename = dream_artist.cptuning.train_embedding(*args)
File "C:\AIStuff\autowebui\stable-diffusion-webui\extensions\DreamArtist-sd-webui-extension\scripts\dream_artist\cptuning.py", line 587, in train_embedding
f"grad:{embedding.vec.grad.detach().cpu().abs().mean().item():.7f}, "
AttributeError: 'NoneType' object has no attribute 'detach'