Unless I'm doing something extremely terribly wrong, it looks like window_resize_fix_init() crashes on the newest version of GMS 2.3 IDE. Can anyone else replicate this or is this a me problem?
The recent runtimes have removed a number of long-deprecated functions (including display_set_size), meaning that this extension has to be rewritten somewhat now. I’ve not gotten around to it yet since it’s not a very straightforward thing to research.