Панель toolbar требует PIL .

Linux.

pip uninstall pillow

sudo apt-get install libjpeg62-dev zlib1g-dev libfreetype6-dev liblcms1-dev python-dev

pip install pillow

Возможно потребуется

sudo apt-get install python-setuptools

http://python.su/forum/topic/31899/?page=1

Windows.

Install Pillow-4.0.0.win32

https://pypi.python.org/pypi/Pillow/4.0.0