Hey Ramza. I've been using your plugin for quite awhile now and never had any issues until recently. For some strange reason, any attacks against the player and viewing the Status window, trigger this error. I have all of the required Yanfly plugins. I turned off the Olivia's Set Bonuses plugin and it crashed with that as well. I have Block and DW (with menu extension) under BattleEngineCore, and exparamfix under AutoPassiveStates. I followed all of Yanfly's load order to make sure I had things in their correct place. I'm not quite sure what happened.
Block State is the same code as you have here, I changed plugin parameters to match my State ID, I copied the animations from your project just to make sure it wasn't that. So I'm not sure what's going on. Any help would be appreciated.
EDIT: I have discovered the cause is StatAllocation. Not sure how to get around that as that is a crucial plugin.