When leaving the lab, it crashes with this error:

The mod The Blueprint Designer Lab (1.0.4) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event BlueprintLab_Blu3wolf::on_gui_click (ID 1)
LuaEntity API call when LuaEntity was invalid.
stack traceback:
[C]: in function 'index'
__BlueprintLab_Blu3wolf/scripts/logic.lua:88: in function 'ToTheWorld'
BlueprintLab_Blu3wolf/scripts/logic.lua:9: in function 'OnLabButton'
BlueprintLab_Blu3wolf/scripts/gui.lua:46: in function <BlueprintLab_Blu3wolf/scripts/gui.lua:44>

this has left me to be softlocked and unable to leave the lab.