If I do not click the guimanger in the shortcut bar at the beginning of the game, but click the other buttons in the upper left corner (such as the button introduced by "bombersters", "Zoom" or "TimeTools"), the game will crash.

Error while runing event guiManager::on_gui_click (ID 1)
guiManager/control.lua:259: attempt to index field '?' (a nil value)
stack traceback:
guiManager/control.lua:259: in function
<guiManager/contril.lua:250>

Thanks for the report, I’ll see if I can fix it later today

This is just a small problem. After all, I usually need to use your mod to close some GUIs first. This is very convenient and useful, thanks.

It was a small problem with a simple fix, should be resolved now. Thanks again for reporting it.