Cannot reload script with formatted strings

[waveteams]

Description

I keep receiving a strange error when I try to reload may script. It says
java.lang.NoSuchMethodError: net.md_5.bungee.api.ChatColor.of(Ljava/lang/String;)Lnet/md_5/bungee/api/ChatColor;

Steps to Reproduce

It started to occure when I modified strings (translated them, used unicode and color formatting)
(code will be below)

Expected Behavior

It should not work like that. There shouldn't be any errors.

Errors / Screenshots

https://pastebin.com/YzeuuE6H - Console log
https://pastebin.com/N0gZpiaD - Throws an error
https://pastebin.com/nDTWncz9 - Works perfectly

Server Information

• Server version/platform: Spigot 1.12.2 | CraftBukkit version git-Spigot-dcd1643-e60fc34 (MC: 1.12.2)
• Skript version: 2.5.3
• Addons: skbee-1.10.2, skellet, skquery-4.1.4, skript-mirror-0.19.1

[MovesLikeJaeger]

You may want to try this with 1.12.2 Paper rather than the version you're using. Also I couldn't help but notice your skript mirror is extremely outdated (this is probably unrelated to your issue but thought I should let you know)

[TPGamesNL]

A check for valid hex (e.g. regex) should be added to Utils.parseHexColor(String):

Skript/src/main/java/ch/njol/skript/util/Utils.java

Line 591 in d093208

public static ChatColor parseHexColor(String hex) {

Besides that, that method should never have been called, because Utils.HEX_SUPPORTED should be false:

Skript/src/main/java/ch/njol/skript/util/Utils.java

Line 480 in da691e2

public final static boolean HEX_SUPPORTED = Skript.isRunningMinecraft(1, 16);