Here is the log:

Exception from long event: System.Exception: GR_FleshFlies.lifeStages[0].bodyGraphicData ---> System.Exception: BoundMap(,) ---> System.Exception: Combat Extended :: CropVertical error while cropping Textures/Things/Pawn/Animal/Special/GR_Transparent_side ---> System.ArgumentException: Color[] has no pixels with alpha < 0.25
at CombatExtended.Def_Extensions.CropVertical (UnityEngine.Color[] array, System.Int32 width, System.Int32 height) [0x00051] in <92389964427a419a9ecb42c85a22c06d>:0
at CombatExtended.BoundsInjector.ExtractBounds (Verse.Graphic graphic, CombatExtended.BoundsInjector+GraphicType type) [0x0001b] in <92389964427a419a9ecb42c85a22c06d>:0
--- End of inner exception stack trace ---
at CombatExtended.BoundsInjector.ExtractBounds (Verse.Graphic graphic, CombatExtended.BoundsInjector+GraphicType type) [0x00045] in <92389964427a419a9ecb42c85a22c06d>:0
at CombatExtended.BoundsInjector.BoundMap (Verse.Graphic graphic, CombatExtended.BoundsInjector+GraphicType type) [0x0001a] in <92389964427a419a9ecb42c85a22c06d>:0
--- End of inner exception stack trace ---
at CombatExtended.BoundsInjector.BoundMap (Verse.Graphic graphic, CombatExtended.BoundsInjector+GraphicType type) [0x00042] in <92389964427a419a9ecb42c85a22c06d>:0
at CombatExtended.BoundsInjector.Inject () [0x00082] in <92389964427a419a9ecb42c85a22c06d>:0
--- End of inner exception stack trace ---
at CombatExtended.BoundsInjector.Inject () [0x000b9] in <92389964427a419a9ecb42c85a22c06d>:0
at Verse.LongEventHandler.UpdateCurrentSynchronousEvent (System.Boolean& sceneChanged) [0x0001d] in <8c412d4a16f94d4cb337e846f2dee469>:0
UnityEngine.StackTraceUtility:ExtractStackTrace ()
(wrapper dynamic-method) Verse.Log:Verse.Log.Error_Patch2 (string)
Verse.LongEventHandler:UpdateCurrentSynchronousEvent (bool&)
Verse.LongEventHandler:LongEventsUpdate (bool&)
(wrapper dynamic-method) Verse.Root:Verse.Root.Update_Patch1 (Verse.Root)
Verse.Root_Entry:Update ()