You must use Haxe version 4.2.5 exactly. Newer versions may throw errors.
To build/compile without errors, make sure you have the following haxelib versions installed:
flixel-addons: 3.3.0
flixel-tools: 1.5.1
flixel-ui: 2.5.0
flixel: 5.3.0
hscript: 2.7.0
hxCodec: 3.0.2
hxcpp-debug-server: 1.2.4
hxcpp: 4.3.2"
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