Please report this error to the mod author.

Error while running event Repair_Turret::on_tick (ID 0)
Repair_Turret/script/repair_turret.lua:431: attempt to perform arithmetic on field 'speed' (a nil value)
stack traceback:
Repair_Turret/script/repair_turret.lua:431: in function 'repair_entity'
Repair_Turret/script/repair_turret.lua:745: in function 'update_turret'
Repair_Turret/script/repair_turret.lua:845: in function 'check_turret_update'
Repair_Turret/script/repair_turret.lua:948: in function 'handler'
core/lualib/event_handler.lua:47: in function <core/lualib/event_handler.lua:45>

Its already fixed

No it isn't... Just got it again

You need to update your version of the mod

Sorted, thank you. Awesome mod by the way and appreciate all your hard work

I just started getting the exact same error

22958.758 Error MainLoop.cpp:1202: Exception at tick 8534930: The mod Repair Turret (0.4.0) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event Repair_Turret::on_tick (ID 0)
Repair_Turret/script/repair_turret.lua:431: attempt to perform arithmetic on field 'speed' (a nil value)
stack traceback:
Repair_Turret/script/repair_turret.lua:431: in function 'repair_entity'
Repair_Turret/script/repair_turret.lua:745: in function 'update_turret'
Repair_Turret/script/repair_turret.lua:845: in function 'check_turret_update'
Repair_Turret/script/repair_turret.lua:948: in function 'handler'
core/lualib/event_handler.lua:47: in function <core/lualib/event_handler.lua:45>

made a stop gap by deleting the turret and replacing it agian, seem so have fixed it for me so far

Its fixed in the latest version, you need to update the mod