1.21.4 Resource Pack Item Models Failed to Load

Console Error:

• mm i generate

• [19:46:01 INFO]: [Mythic] Generating resource pack files...
• [19:46:01 INFO]: [Generation] Starting Pack Generator...
• [19:46:01 INFO]: [Generation] Processing ModelEngine Pack...
• [19:46:01 INFO]: [Generation] Processing MythicHUD Pack...
• [19:46:01 INFO]: [Generation] Generating Custom Blocks...
• [19:46:01 INFO]: [Generation] Generating Items...
• [19:46:01 WARN]: [MythicMobs] Failed to load Legacy Definition for material TOTEM_OF_UNDYING
• [19:46:01 WARN]: java.lang.IllegalArgumentException: JSON file assets\minecraft\items\totem_of_undying.json not found in zip C:\mcserver\1.21.4\plugins\MythicMobs\generation.assets\1.21.4\1.21.4.zip
• [19:46:01 WARN]: at MythicCrucible-2.2.0-SNAPSHOT.jar//io.lumine.mythiccrucible.utils.pack.GsonZipLoader.loadJsonFromZip(GsonZipLoader.java:30)
• [19:46:01 WARN]: at MythicCrucible-2.2.0-SNAPSHOT.jar//io.lumine.mythiccrucible.generation.PackGenerationManager.buildLegacyItemDefinition(PackGenerationManager.java:591)
• [19:46:01 WARN]: at MythicCrucible-2.2.0-SNAPSHOT.jar//io.lumine.mythiccrucible.generation.PackGenerationManager.lambda$generatePack$2(PackGenerationManager.java:362)
• [19:46:01 WARN]: at java.base/java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1708)
• [19:46:01 WARN]: at MythicCrucible-2.2.0-SNAPSHOT.jar//io.lumine.mythiccrucible.generation.PackGenerationManager.generatePack(PackGenerationManager.java:362)
• [19:46:01 WARN]: at MythicCrucible-2.2.0-SNAPSHOT.jar//io.lumine.mythiccrucible.commands.generation.GeneratePackCommand.lambda$onCommand$1(GeneratePackCommand.java:23)
• [19:46:01 WARN]: at MythicMobs-5.9.0-SNAPSHOT.jar//io.lumine.mythic.bukkit.utils.Delegates$RunnableToSupplier.get(Delegates.java:121)
• [19:46:01 WARN]: at MythicMobs-5.9.0-SNAPSHOT.jar//io.lumine.mythic.bukkit.utils.promise.LuminePromise$SupplyRunnable.run(LuminePromise.java:654)
• [19:46:01 WARN]: at MythicMobs-5.9.0-SNAPSHOT.jar//io.lumine.mythic.bukkit.utils.tasks.LumineExecutors$SchedulerWrappedRunnable.run(LumineExecutors.java:70)
• [19:46:01 WARN]: at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
• [19:46:01 WARN]: at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
• [19:46:01 WARN]: at java.base/java.lang.Thread.run(Thread.java:1583)

This issue has remained unresolved for quite some time...