ModuleNotFoundError: No module named 'torchtext.legacy' in colab

[lappemic]

When i tried to follow the notebook in Training model for pets binary segmentation with Pytorch-Lightning i encountered the problem that when the line

import pytorch_lightning as pl

is executed, the ModuleNotFoundError in the title appears. Just installing torchtext.legacy with

!pip install torchtext.legacy

did not solve the problem.