VPN Launcher Error - missing polkit agent

Using Bitmask Version: 0.6.1 (914755c3f6) My system: ubuntu 14.04 LTS Desktop Environment: LXDE (Lubuntu)

After wanting to "Turn ON" Bitmask I get following Error: VPN Launcher Error

This is what the logfile says:

2014-09-23 13:41:23,960 - DEBUG - L#96 : leap.bitmask.services.eip.linuxvpnlauncher:_try_to_launch_agent() - Trying to launch polkit agent
2014-09-23 13:41:26,396 - WARNING - L#156 : leap.bitmask.services.eip.linuxvpnlauncher:maybe_pkexec() - No polkit auth agent found. pkexec will use its own auth agent.
2014-09-23 13:41:26,398 - ERROR - L#221 : leap.bitmask.services.eip.vpnprocess:start() - Error while getting vpn command...
2014-09-23 13:41:26,416 - ERROR - L#369 : leap.bitmask.gui.eip_status:set_eip_status() -
2014-09-23 13:41:26,418 - ERROR - L#369 : leap.bitmask.gui.eip_status:set_eip_status() - VPN Launcher error. See the logs for more info.
2014-09-23 13:41:26,429 - DEBUG - L#59 : leap.bitmask.gui.statemachines:onEntry() - State Encrypted Internet::off entered. Emitting signal ...

(from redmine: created on 2014-09-27, closed on 2014-10-01, relates #6150 (closed), relates #6043 (closed), duplicates #6218)