I'm getting the same issue on 1.9.1
Mods:
ASET Agency (ASETAgency 1.0)
ASET Props (ASETProps 1.5)
ClickThrough Blocker (ClickThroughBlocker 0.1.9.5)
Community Delta-V Maps (CommunityDeltaVMaps v2.6.0)
Contract Configurator (ContractConfigurator 1.28.0)
Distant Object Enhancement Continued (DistantObject v2.0.0.2)
Distant Object Enhancement Continued default config (DistantObject-default v2.0.0.2)
Docking Port Alignment Indicator (DockingPortAlignmentIndicator 6.8.6)
IndicatorLights (IndicatorLights 1.6)
Kerbal Alarm Clock (KerbalAlarmClock v3.13.0.0)
Kerbal Engineer Redux (KerbalEngineerRedux 1.1.7.1)
Kerbal Joint Reinforcement Continued (KerbalJointReinforcementContinued v3.5.1)
MechJeb 2 (MechJeb2 2.9.2.0)
Minimum Ambient Lighting Updated (MinAmbLightUpd 1.2.6)
Module Manager (ModuleManager 4.1.3)
RasterPropMonitor (RasterPropMonitor 1:v0.31.3)
RasterPropMonitor Core (RasterPropMonitor-Core 1:v0.31.3)
SCANsat (SCANsat v18.14)
Toolbar (Toolbar 1:1.8.0.5)
Toolbar Controller (ToolbarController 1:0.1.9.4)
Zero MiniAVC (ZeroMiniAVC 1:1.1.0.1)