i found the errors and.. i don't know why it's error i'm never touched the folder of Mythicmob
Tested in Server Version: Purpur-1.17.1-1404 Mythicmob: 5.0.0 (Dev Builds) and 4.13.2 (Free)
My all plugins:
[01:32:05 INFO]: Plugins (65): AlonsoTags, AureliumSkills, BetterGUI, BetterRTP, BlockLocker, BuildersWand, BungeeGuard, ChestSort, Chunky, Citizens, CMI, CMILib, Command4Bungee*, CoreProtect, CrazyAuctionsPlus, DailyShop, DeathMessages, eco, EcoEnchants, EcoEnchantsGUI, EpicPluginLib, ExtractableEnchantments, FastLogin, GoldenCrates, GSit, HeadDatabase, Insights, InteractiveBoard, InteractiveChat, ItemsAdder, LibsDisguises, LoneLibs, LuckPerms, MarriageMaster, MMOItems, Multiverse-Core, Multiverse-NetherPortals, Multiverse-Portals, MythicLib, MythicMobs, NBTAPI, NexEngine, PlaceholderAPI, PlayerParticles, PlayerPoints, PlayerWarps, PlayMoreSounds, ProtectionStones, ProtocolLib, RoseStacker, ServerUtils, ShopGUIPlus, Shopkeepers, SkinsRestorer, spark, TAB, TabCompleteFilter, TempFly, TradeSystem, UltimateAutoRestart, Vault, Vulcan, WorldEdit, WorldGuard, WorldGuardExtraFlags