The issue occurred after modifying the character images.

[morgenyu]

Cause: java.lang.NullPointerException at com.badlogic.gdx.graphics.g2d.PixmapPacker$GuillotineStrategy.pack(PixmapPacker.java:443) at com.badlogic.gdx.graphics.g2d.PixmapPacker.pack(PixmapPacker.java:158) at com.brashmonkey.spriter.LibGdx.LibGdxLoader.finishLoading(LibGdxLoader.java:109) at com.brashmonkey.spriter.Loader.load(Loader.java:78) at com.brashmonkey.spriter.Loader.load(Loader.java:86) at basemod.animations.SpriterAnimation.(SpriterAnimation.java:35) at orchismod.character.MyCharacter.(MyCharacter.java:122) at orchismod.character.MyCharacter$Meta.registerCharacter(MyCharacter.java:82) at orchismod.BasicMod.receiveEditCharacters(BasicMod.java:230) at basemod.BaseMod.publishEditCharacters(BaseMod.java:2553) at basemod.patches.com.megacrit.cardcrawl.core.CardCrawlGame.EditCharactersHook.Insert(EditCharactersHook.java:20) at com.megacrit.cardcrawl.core.CardCrawlGame.create(CardCrawlGame.java:299) at com.badlogic.gdx.backends.lwjgl.LwjglApplication.mainLoop(LwjglApplication.java:149) at com.badlogic.gdx.backends.lwjgl.LwjglApplication$1.run(LwjglApplication.java:126) I encountered this issue while trying to change the character images, but the problem persisted even after I reverted the images back to their original state.