skript-mirror doesn't like OpenJ9

[TrademarkTM]

Describe the bug
skript-mirror doesn't work properly with OpenJ9.

https://adoptopenjdk.net/releases.html?variant=openjdk8&jvmVariant=openj9
To swap it (if you use Windows): https://paste.md-5.net/jelihemuzo.bash

To reproduce
Code:

command /dafrick:
	trigger:
		set {_item} to water bottle
		set {_meta} to {_item}.getItemMeta()
		{_meta}.addItemFlags(ItemFlag.HIDE_POTION_EFFECTS)
		{_item}.setItemMeta({_meta})
		
		send "mafia works"

Errors: https://paste.md-5.net/ivavucared.md

Server information

• skript-mirror: 2.0.0
• Skript: 2.3.6
• Bukkit: Paper build 1613
• Minecraft: 1.12.2
• Java: OpenJ9 8 212
• OS: Windows

The issue was found by TeAm6_AZLIK#5741 (Discord).