[Bug] Game crashing before I have a chance to play.

[KiraSvo]

Describe the bug I just downloaded the mod today and whenever I press play on the Minecraft launcher, after a few seconds of the player opening up, it crashes.

To Reproduce Steps to reproduce the behaviour. (What were you doing when this happened) :

1. Open the Minecraft Launcher
2. Press play to begin the game
3. Wait for the game to open up
4. After a few seconds of the player opening, it crashes.

Expected behaviour I expected my game to open and for me to be able to play Minecraft while using this mod.

Screenshots

Crash Report or Game Log https://pastebin.com/MrTtWSKe

Please complete the following information):

• Mod Version Number: 2.1.0
• Bookworm Version Number: 2.5.2.1
• Forge Version Number: 1.12.2
• Are other mods installed? : No
• Is OptiFine installed? : No
• Is this bug present in single player or on a server or both? : The game crashes before I get to the main menu.

Additional context I apologise if you've answered this before, I couldn't find anything about it.

[JoelZBub]

You have the Developer Version of the mod installed. Download the Main File from this link: https://www.curseforge.com/minecraft/mc-mods/zoo-wild-animals-rebuild/files