GMLive.js uses GameMaker’s HTML5 runtime functions directly, meaning that these did not function as intended in GameMaker runtime itself as of ~1.4.1804 (“GMS1”) / 2.2.5 (“GMS2”) accordingly. You can try fiddling with version (try GMS2) / mode (try GL) settings, but if that is of no help - that’s it. Manually trying to fix bugs in obfuscated GameMaker runtime code is way too time-consuming.