Randomly started getting this error when I loaded up my server:

[d3bot] lua/includes/util.lua:228: attempt to index local 'object' (a function value)

1. IsValid - lua/includes/util.lua:228
2. UpdateBotCmdFunction - addons/d3bot/lua/d3bot/sv_zs_bot_handler/handlers/undead_crow.lua:18
3. fn - addons/d3bot/lua/d3bot/sv_zs_bot_handler/handle.lua:31
4. unknown - lua/ulib/shared/hook.lua:109

[d3bot] lua/includes/util.lua:228: attempt to index local 'object' (a function value)

1. IsValid - lua/includes/util.lua:228
2. UpdateBotCmdFunction - addons/d3bot/lua/d3bot/sv_zs_bot_handler/handlers/undead_fallback.lua:30
3. fn - addons/d3bot/lua/d3bot/sv_zs_bot_handler/handle.lua:31
4. unknown - lua/ulib/shared/hook.lua:109

Zombies will spawn but not move or attack. I've tried fresh reinstalls of the mod, the game, and other mods.
I've seen two other instances of this happening to people but I thought I'd bump the question up again.