I have Weapon_ElementalSpells and bots using fire or being on fire does not cause any problems.
Have you redownloaded it to see if it would work now?
How many add-ons do you have? There may be a confliction.
I've got quite a bit of addons, but only a certain few do continuous damage. I have the syringes that can poison you, I have PassSpells, and I got the chemical grenades. I've redownloaded it once just for kicks with hopefully a newer version.
iirc though bots being on fire caused the crash