thermal Error

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2: table // 40307b98
1: table // 40307b98
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stack traceback:
        [C]: in function 'error'
        /engine/interface/ActorTalents.lua:153: in function </engine/interface/ActorTalents.lua:135>
Lua Error: /engine/interface/ActorTalents.lua:175: /engine/interface/ActorTalents.lua:153: /data/talents/psionic/thermal-mastery.lua:117: attempt to index global 'target' (a nil value)
stack traceback:
        /data/talents/psionic/thermal-mastery.lua:117: in function 'damtype'
        /engine/interface/ActorProject.lua:197: in function 'project'
        /data/talents/psionic/thermal-mastery.lua:114: in function </data/talents/psionic/thermal-mastery.lua:109>
        [C]: in function 'xpcall'
        /engine/interface/ActorTalents.lua:148: in function </engine/interface/ActorTalents.lua:135>
        At [C]:-1
        At [C]:-1 error
        At /engine/interface/ActorTalents.lua:175 useTalent
        At /mod/ai//tactical.lua:382 runAI
        At /mod/ai//tactical.lua:408 doAI
        At /mod/class/NPC.lua:61 act
        At /engine/GameEnergyBased.lua:126 tickLevel
        At /engine/GameEnergyBased.lua:62 tick
        At /engine/GameTurnBased.lua:46 tick
        At /mod/class/Game.lua:1177
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