keep getting this crash, just running around killing biters

The mod Personal Transformer2 (1.0.8) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event PersonalTransformer2::on_tick (ID 0)
LuaEntity API call when LuaEntity was invalid.
stack traceback:
[C]: in function 'index'
__PersonalTransformer2/control.lua:779: in function 'teleportEntitiesToPlayerPosition'
PersonalTransformer2/control.lua:367: in function 'update_personal_transformer'
PersonalTransformer2/control.lua:343: in function <PersonalTransformer2/control.lua:336>

How often does this occur? Was this occurring using a previous version of this mod?

And if there's any other information you could provide, that would be very helpful. At the moment I'm not able to reproduce it. But I'm trying some other things to see if I can. What were you using to kill the biters? Were there any other mods that you were using? Does the crash occur when you use a specific weapon/ammo/item? The more information I have, the easier it is for me to fix this issue.

it just started occurring when I posted this. load a game and run around for a few mins just using personal lasers for 5dim battlefield mod to clear out bitters on home planet and then this error would pop up. since it started, it happened 3-4 times but every time until I removed the PTs from power armor. was working fine since beginning of game, nothing really changed unless this mod updated. I see it was updated, so I'll try it again to see if I continue to get error.

issue solved---

Great! Hope things keep working well for you then.