GameMakerStudio 2.2.3.574 HTML5 module does not work with the newest GMLiveForGMS2.3+
If you try to run a project with obj_gmlive #macro live_enabled 1 you'll find
Uncaught ReferenceError: GameMaker_Init is not defined at index.html:83
in the browser console or something similar.
It seems like some unused variables are treated as syntax errors and that the HTML5 compiler is complaining about them.
I didn't try yet to simply use those variables for something non-sensical just so the compiler is fine with it. I'll update as soon as I can.
Until then someone else proposed to simply replace the #macro live_enabled 1 in obj_gmlives create event with #macro live_enabled browser_not_a_browser. This way you can at least use it in the project, build everything using GMLive and then simply test it on the target platform.