Hi friends，
I am getting the error like this in chapter 4.
thank you for help.
You need to upgrade your fastai version 
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you can write ‘cnn_learner’ insted. vision_learner used in the upgradet version
thank you for reply. it works now
thank you. I changed nothing, just rerun it and it works now.
For those that were confused like me, this is not a git-pull upgrade… but a terminal upgrade:
pip3 install --upgrade fastai
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Hello. I have the same issue. Upgrading fastai does not solve it.
Try changing vision_learner with cnn_lerner
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I’m also getting this issue in my notebook on Kaggle. Switching to “cnn_learner” fixes the problem.
I found that if the accelerator is TPU on Kaggle, it will result in such error. However, I don’t know why.
I want to know why vision_learner is not defined. If I tried to import it using
from fastai.vision.all import vision_learner
using
learn = vison_learner(dls, resnet34, metrics=error_rate)
it does not give error but when I try to train the model, it starts to show errors
You have a typo.
You typed vison_learner instead of vision_learner 
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