SSH Manager won't start, Linux Mint 18.1

[ex1t]

Hello,

i just installed the PP SSH Manager on my Linux Mint 18.1 system, but when i try to start it i get the following error:

Traceback (most recent call last):
File "/usr/bin/perfect-privacy-ssh", line 19, in <module>
current_locale, encoding = locale.getdefaultlocale()
File "/usr/lib/python2.7/locale.py", line 545, in getdefaultlocale
return _parse_localename(localename)
File "/usr/lib/python2.7/locale.py", line 477, in _parse_localename
raise ValueError, 'unknown locale: %s' % localename

I am thankfully about every hint or solution you can provide!