0.10.1 (Test Branch) Game crashes in Battle and new Yseros Error

Playing the Fanatic:

Error 1:

This is the Error that happend in normal battles

############################################################################################
ERROR in
action number 1
of Step Event0
for object obj_battlecontroller:

Variable Get 118593 (104454, -2147483648)############################################################################################
gml_Script_bc_EventDamage (line 2427)
gml_Script_bc_CreatureAttack (line 1390)
gml_Script_bc_ArtificialIntelligence (line 1308)
gml_Script_bc_Turn (line 10)
gml_Object_obj_battlecontroller_Step_0 (line 667)

Error 2:

Trying to Fight Yseros now doesnt give me an specific error message, the game is just closed after the battle starts

Could you please attach your save file or PM it to me so I can try to reproduce the Yseros crash?