Hello! As odd it sounds, you get that error because it really isn't an array - this bunch of built-in variables (alarm[], view_*, few others) are a special case (v = alarm[i] calls alarm_get, alarm[i] = v calls alarm_set), trying to access them as-is accesses the first item instead, and thus when GMLive does an equivalent of
var value = variable_global_get("view_camera");
var result = value[index];that doesn't work out because we get view_camera[0] in value.
For 2.2.5 I had a giant (10K lines) file for accessing every built-in function/variable, which I had mostly trimmed down now (thanks to introduced ability to reference built-in functions in 2.3)... except I forgot about view_ variables. I'll fix that for the next release.