The mod RPG Items (0.21.7) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event m-rpg_items::on_entity_damaged (ID 103)
Entity is not entity-with-health.
stack traceback:
[C]: in function 'damage'
m-rpg_items/control.lua:753: in function <m-rpg_items/control.lua:740>

from my understanding of what triggers this error, whenever the player character comes in contact with the poison cloud from the RPG mod that occurs when the magic stat procs, it causes this error. Not sure if just poison cloud in general like from poison capsules, cause I don't have the items, but for sure the cloud that appears as a result of the RPG mod's Magic Stat randomly throwing out a poison cloud.

Fixed https://mods.factorio.com/mod/m-rpg_items/downloads