Error while running event BlueprintLab_Credomane::on_gui_click (ID 1)
LuaEntity API call when LuaEntity was invalid.
stack traceback:
BlueprintLab_Credomane/scripts/logic.lua:72: in function 'ToTheWorld'
BlueprintLab_Credomane/scripts/logic.lua:9: in function 'OnLabButton'
BlueprintLab_Credomane/scripts/gui.lua:53: in function <BlueprintLab_Credomane/scripts/gui.lua:49>
stack traceback:
[C]: in function 'index'
__BlueprintLab_Credomane/scripts/logic.lua:72: in function 'ToTheWorld'
BlueprintLab_Credomane/scripts/logic.lua:9: in function 'OnLabButton'
BlueprintLab_Credomane/scripts/gui.lua:53: in function <BlueprintLab_Credomane/scripts/gui.lua:49>

That's the error that happens when you are inside the lab already when you switch from the other blueprint lab mod to mine. Or perhaps your player character in the outside world died for some reason? It is a known issue that I'm trying to find a good-n-proper fix for.

I worked on some checks that should resolve this issue in version 0.17.6. The mod will do it's best to locate your character and in the event it can't find it then it will create you a new character at spawn.

Since you are getting this error it is nearly guaranteed that it is going to make you a new character but there is a chance it will located it if the old one if it is still alive.