Error while running event Helicopters::on_configuration_changed
Helicopters/logic/gui/gaugeGui.lua:90: attempt to call method 'removeGaugeGui' (a nil value)
stack traceback:
Helicopters/logic/gui/gaugeGui.lua:90: in function 'destroy'
Helicopters/logic/gui/gaugeGui.lua:7: in function 'reSetGaugeGui'
Helicopters/control.lua:99: in function <Helicopters/control.lua:52>

Tried on 0.17.55; 0,17.56; 0.17.57. Always the same. Cannot load save.

0.17.79

126.591 Error MainLoop.cpp:1195: Exception at tick 16077776: The mod Helicopters caused a non-recoverable error.
Please report this error to the mod author.

Error while running event Helicopters::on_runtime_mod_setting_changed (ID 59)
Helicopters/logic/gui/gaugeGui.lua:90: attempt to call method 'removeGaugeGui' (a nil value)
stack traceback:
Helicopters/logic/gui/gaugeGui.lua:90: in function 'destroy'
Helicopters/logic/gui/gaugeGui.lua:7: in function 'reSetGaugeGui'
Helicopters/control.lua:380: in function <Helicopters/control.lua:370>
126.591 Error ServerMultiplayerManager.cpp:92: MultiplayerManager failed: "The mod Helicopters caused a non-recoverable error.
Please report this error to the mod author.

Error while running event Helicopters::on_runtime_mod_setting_changed (ID 59)
Helicopters/logic/gui/gaugeGui.lua:90: attempt to call method 'removeGaugeGui' (a nil value)
stack traceback:
Helicopters/logic/gui/gaugeGui.lua:90: in function 'destroy'
Helicopters/logic/gui/gaugeGui.lua:7: in function 'reSetGaugeGui'
Helicopters/control.lua:380: in function <Helicopters/control.lua:370>"

I figure out, after helicopter crash, speed clock remain on display and after enter to helicopter server crash.
Solutions: Store all items into chest and secodn admin need delete your character from server