Everpad does not Start on Ubuntu Gnome

[romansCode]

Everpad does not start. Starting from the terminal gives

Traceback (most recent call last):
File "/usr/local/bin/everpad", line 5, in
from pkg_resources import load_entry_point
File "/usr/lib/python2.7/dist-packages/pkg_resources/init.py", line 3020, in
working_set = WorkingSet._build_master()
File "/usr/lib/python2.7/dist-packages/pkg_resources/init.py", line 614, in _build_master
ws.require(requires)
File "/usr/lib/python2.7/dist-packages/pkg_resources/init.py", line 920, in require
needed = self.resolve(parse_requirements(requirements))
File "/usr/lib/python2.7/dist-packages/pkg_resources/init.py", line 807, in resolve
raise DistributionNotFound(req)
pkg_resources.DistributionNotFound: PySide