Hi,
The problem is: when you installed fastai dependencies you install Fastai 1.0 which is not made for courses. You need to use Fastai framework 0.7.0
Just replace the configuration code (for Google Colab) with this one, which worked for me:
!pip uninstall fastai
!pip install Pillow==4.1.1
!pip install "fastai==0.7.0"
!pip install torchtext==0.2.3
!apt-get -qq install -y libsm6 libxext6 && pip install -q -U opencv-python
import cv2
from os import path
from wheel.pep425tags import get_abbr_impl, get_impl_ver, get_abi_tag
platform = '{}{}-{}'.format(get_abbr_impl(), get_impl_ver(), get_abi_tag())
!apt update && apt install -y libsm6 libxext6
accelerator = 'cu80' if path.exists('/opt/bin/nvidia-smi') else 'cpu'
!pip install -q http://download.pytorch.org/whl/{accelerator}/torch-0.3.0.post4-{platform}-linux_x86_64.whl torchvision
import torch
!pip install image
%matplotlib inline
from fastai.imports import *