Even though this is expected, just wanting to make sure you're aware. :)

Debug paste link: https://pastebin.com/m4zStESF

Description and relevant errors: Spams console and said report it

MinecraftVersion.java should probably have the VERSION_PATTERN changed..

private static final Pattern VERSION_PATTERN = Pattern.compile(".\(.MC.\s([a-zA-Z0-9\-\.]+)\s.\)");