There is a breaking config change when upgrading to Zombies Utils v2.5.2 or above.

This was kind of unavoidable due to now using deobfuscated Minecraft on 26.1.2, which changed some identifiers that were already used in the old configs.

If you have used Zombies Utils on fabric before, you will need to manually delete (this will reset your configs) or edit the config file. You can achieve this by editing the file config/zombiesutils/config.json5 in your instance's working directory (this is launcher-specific, but known as .minecraft on the official launcher).

If you want to keep your old configs and just do a few simple edits, simply edit the file (Notepad or whatever plaintext editor works) and do the following changes:

• Replace all occurrences of the word field_13353 with the word namespace
• Replace all occurrences of the word field_13355 with the world path.

Not updating the config will result in auditory wave-timing being completely broken!