AttributeError: 'tuple' object has no attribute 'size'

[40min]

train is always falling even with such kind of file:
"""
SentimentText;Sentiment
aaa;1
bbb;2
ccc;3
"""
Params of running -- just data_path
Packages installed:
numpy==1.16.1
pandas==0.24.1
Pillow==5.4.1
protobuf==3.6.1
python-dateutil==2.8.0
pytz==2018.9
scikit-learn==0.20.2
scipy==1.2.1
six==1.12.0
sklearn==0.0
tensorboardX==1.6
torch==1.0.1.post2
torchvision==0.2.1
tqdm==4.31.1

[ahmedbesbes]

Sentiment should be a binary value (0/1)

[40min]

Oh, thanks, I've spent hours trying to understand before I asked here.