fails to start at all on fresh install of ubuntu 18.04

[fsantiago07044]

fresh ubuntu 18.04 with LAMP stack from DO.

installed either from source or .deb package. added tornado .deb as well.

manually added python-support package to get the above to install at all.

running from cli produces:

gateone
[W 181205 18:57:48 locale:61] No translation found for locale: C
[W 181205 18:57:48 locale:61] No translation found for locale: C
[W 181205 18:57:48 locale:61] No translation found for locale: C
Traceback (most recent call last):
File "/usr/local/bin/gateone", line 11, in
load_entry_point('gateone==1.2.0', 'console_scripts', 'gateone')()
File "/usr/lib/python2.7/dist-packages/pkg_resources/init.py", line 480, in load_entry_point
return get_distribution(dist).load_entry_point(group, name)
File "/usr/lib/python2.7/dist-packages/pkg_resources/init.py", line 2693, in load_entry_point
return ep.load()
File "/usr/lib/python2.7/dist-packages/pkg_resources/init.py", line 2324, in load
return self.resolve()
File "/usr/lib/python2.7/dist-packages/pkg_resources/init.py", line 2330, in resolve
module = import(self.module_name, fromlist=['name'], level=0)
File "/usr/local/lib/python2.7/dist-packages/gateone-1.2.0-py2.7.egg/gateone/core/server.py", line 402, in
from gateone.auth.authorization import require, authenticated, policies
File "/usr/local/lib/python2.7/dist-packages/gateone-1.2.0-py2.7.egg/gateone/auth/authorization.py", line 38, in
@memoize
File "/usr/local/lib/python2.7/dist-packages/gateone-1.2.0-py2.7.egg/gateone/core/utils.py", line 290, in init
MEMO = AutoExpireDict(timeout=timeout, interval="30s")
File "/usr/local/lib/python2.7/dist-packages/gateone-1.2.0-py2.7.egg/gateone/core/utils.py", line 161, in init
self.interval = kwargs.pop('interval')
File "/usr/local/lib/python2.7/dist-packages/gateone-1.2.0-py2.7.egg/gateone/core/utils.py", line 211, in interval
self._timeout_checker, value, io_loop=self.io_loop)
TypeError: init() got an unexpected keyword argument 'io_loop'
Exception AttributeError: "'AutoExpireDict' object has no attribute '_key_watcher'" in <bound method AutoExpireDict.del of {}> ignored

i'm clueless...? Thanks.

[GonzRon]

pip install tornado==4.5