This error seems to be related to the 2.3 update. Also can't figure out how to fix it. Did you fix it?
Try to put brackets like this
create_textevent(
[ //myText
load_string_json(global.LANGUAGE, "forest0"),
load_string_json(global.LANGUAGE, "forest1"),
load_string_json(global.LANGUAGE, "forest2"),
load_string_json(global.LANGUAGE, "forest3"),
[load_string_json(global.LANGUAGE, "forest4"), load_string_json(global.LANGUAGE, "forest5")],
load_string_json(global.LANGUAGE, "forest6"),
load_string_json(global.LANGUAGE, "forest7"),
load_string_json(global.LANGUAGE, "forest8"),
load_string_json(global.LANGUAGE, "forest9")
],
[ob, og, og, ob, op, ob, og, og, ob], //mySpeakers
[ [28,4, 42,0], [7,1, 11,0], [21,1, 29,0], [-1], [-1], [1,5, 5,0], [-1], [1,6, 3,0], [-1] ], //myEffects
-1, //myTextSpeed
[0, 0, 0, 0, 1, 0, 0, 0, 0], //myTypes
[0, 0, 0, 0, [5, 7], 0, -1 ,0, -1], //myNextLine
-1, //myScripts
-1, //myTextCol
[0, 3, 2, 1, 0, 5, 3, 1, 2], //myEmotion
-1 //myEmote
);