Stried cutting myself to increase my first aid skill, I knew the risk but I can't stitch the deep wound. When it reaches the end of the stitching bar it pops out an error:

ERROR: General , 1690037868579> ExceptionLogger.logException> Exception thrown java.lang.RuntimeException: __mul not defined for operands in perform at KahluaUtil.fail line:82.
ERROR: General , 1690037868579> DebugLogStream.printException> Stack trace:
java.lang.RuntimeException: __mul not defined for operands in perform
at se.krka.kahlua.vm.KahluaUtil.fail(KahluaUtil.java:82)
at se.krka.kahlua.vm.KahluaThread.luaMainloop(KahluaThread.java:676)
at se.krka.kahlua.vm.KahluaThread.call(KahluaThread.java:163)
at se.krka.kahlua.vm.KahluaThread.pcall(KahluaThread.java:1980)
at se.krka.kahlua.vm.KahluaThread.pcall(KahluaThread.java:1782)
at se.krka.kahlua.integration.LuaCaller.pcall(LuaCaller.java:85)
at zombie.characters.CharacterTimedActions.LuaTimedActionNew.perform(LuaTimedActionNew.java:104)
at zombie.characters.IsoGameCharacter.updateInternal(IsoGameCharacter.java:9726)
at zombie.util.lambda.Invokers$Params1$CallbackStackItem.run(Invokers.java:37)
at zombie.core.profiling.AbstractPerformanceProfileProbe.invokeAndMeasure(AbstractPerformanceProfileProbe.java:71)
at zombie.core.profiling.AbstractPerformanceProfileProbe.lambda$invokeAndMeasure$0(AbstractPerformanceProfileProbe.java:83)
at zombie.util.lambda.Stacks$Params3$CallbackStackItem.invoke(Stacks.java:230)
at zombie.util.lambda.Stacks$GenericStack.invokeAndRelease(Stacks.java:26)
at zombie.util.Lambda.capture(Lambda.java:130)
at zombie.core.profiling.AbstractPerformanceProfileProbe.invokeAndMeasure(AbstractPerformanceProfileProbe.java:81)
at zombie.characters.IsoGameCharacter.update(IsoGameCharacter.java:9464)
at zombie.characters.IsoPlayer.updateInternal1(IsoPlayer.java:1943)
at zombie.util.lambda.Invokers$Params1$CallbackStackItem.run(Invokers.java:37)
at zombie.core.profiling.AbstractPerformanceProfileProbe.invokeAndMeasure(AbstractPerformanceProfileProbe.java:71)
at zombie.core.profiling.AbstractPerformanceProfileProbe.lambda$invokeAndMeasure$0(AbstractPerformanceProfileProbe.java:83)
at zombie.util.lambda.Stacks$Params3$CallbackStackItem.invoke(Stacks.java:230)
at zombie.util.lambda.Stacks$GenericStack.invokeAndRelease(Stacks.java:26)
at zombie.util.Lambda.capture(Lambda.java:130)
at zombie.core.profiling.AbstractPerformanceProfileProbe.invokeAndMeasure(AbstractPerformanceProfileProbe.java:81)
at zombie.characters.IsoPlayer.update(IsoPlayer.java:1924)
at zombie.MovingObjectUpdateSchedulerUpdateBucket.update(MovingObjectUpdateSchedulerUpdateBucket.java:79)
at zombie.MovingObjectUpdateScheduler.update(MovingObjectUpdateScheduler.java:145)
at zombie.iso.IsoCell.ProcessObjects(IsoCell.java:2955)
at zombie.iso.IsoCell.updateInternal(IsoCell.java:5750)
at zombie.util.lambda.Invokers$Params1$CallbackStackItem.run(Invokers.java:37)
at zombie.core.profiling.AbstractPerformanceProfileProbe.invokeAndMeasure(AbstractPerformanceProfileProbe.java:71)
at zombie.core.profiling.AbstractPerformanceProfileProbe.lambda$invokeAndMeasure$0(AbstractPerformanceProfileProbe.java:83)
at zombie.util.lambda.Stacks$Params3$CallbackStackItem.invoke(Stacks.java:230)
at zombie.util.lambda.Stacks$GenericStack.invokeAndRelease(Stacks.java:26)
at zombie.util.Lambda.capture(Lambda.java:130)
at zombie.core.profiling.AbstractPerformanceProfileProbe.invokeAndMeasure(AbstractPerformanceProfileProbe.java:81)
at zombie.iso.IsoCell.update(IsoCell.java:5696)
at zombie.iso.IsoWorld.updateInternal(IsoWorld.java:3499)
at zombie.util.lambda.Invokers$Params1$CallbackStackItem.run(Invokers.java:37)
at zombie.core.profiling.AbstractPerformanceProfileProbe.invokeAndMeasure(AbstractPerformanceProfileProbe.java:71)
at zombie.core.profiling.AbstractPerformanceProfileProbe.lambda$invokeAndMeasure$0(AbstractPerformanceProfileProbe.java:83)
at zombie.util.lambda.Stacks$Params3$CallbackStackItem.invoke(Stacks.java:230)
at zombie.util.lambda.Stacks$GenericStack.invokeAndRelease(Stacks.java:26)
at zombie.util.Lambda.capture(Lambda.java:130)
at zombie.core.profiling.AbstractPerformanceProfileProbe.invokeAndMeasure(AbstractPerformanceProfileProbe.java:81)
at zombie.iso.IsoWorld.update(IsoWorld.java:3427)
at zombie.gameStates.IngameState.updateInternal(IngameState.java:1617)
at zombie.gameStates.IngameState.update(IngameState.java:1333)
at zombie.gameStates.GameStateMachine.update(GameStateMachine.java:101)
at zombie.GameWindow.logic(GameWindow.java:298)
at zombie.core.profiling.AbstractPerformanceProfileProbe.invokeAndMeasure(AbstractPerformanceProfileProbe.java:71)
at zombie.GameWindow.frameStep(GameWindow.java:765)
at zombie.GameWindow.run_ez(GameWindow.java:681)
at zombie.GameWindow.mainThread(GameWindow.java:495)
at java.base/java.lang.Thread.run(Unknown Source)
LOG : General , 1690037868581> -----------------------------------------
STACK TRACE
-----------------------------------------
function: perform -- file: ISStitch.lua line # 92 | MOD: Pie's First Aid Overhaul