AutoLibrarian Crashing

frasseking

Hi! I've had this problem for a while and i don't know how to fix it but when i try to open the AutoLibrarian wanted books setting my game crashes every time. Does anybody know how i can fix it?

Alexander01998

Hey @frasseking, sorry to hear you're having trouble with AutoLibrarian!

To figure out what's causing the crash, I'll need to see your crash report. When Minecraft crashes, it generates a crash report file that contains all the technical details about what went wrong.

You can find the crash report in your .minecraft/crash-reports folder. The file will be named something like crash-2025-08-27_[time]-client.txt. Just grab the most recent one that corresponds to when you tried opening the AutoLibrarian settings.

You can either paste the contents here (use a code block if it's long) or upload the file directly to the forum. The crash report will tell me exactly what's going wrong so I can fix it in the next update.

Also, let me know what Minecraft version and Wurst version you're using - that info helps too!

frasseking

Alexander01998 Hey thanks for answering. i'm using the latest wurst and minecraft version (1.21.8)

Crash report

Time: 2025-08-27 19:29:45

Description: Rendering screen

java.lang.NullPointerException: Cannot invoke "net.minecraft.class_1887.comp_2686()" because "enchantment" is null

at knot//net.wurstclient.hacks.autolibrarian.BookOffer.getEnchantmentNameWithLevel(BookOffer.java:69)

at knot//net.wurstclient.clickgui.screens.EditBookOffersScreen$Entry.method_25343(EditBookOffersScreen.java:200)

at knot//net.minecraft.class_350.method_44397(class_350.java:327)

at knot//net.minecraft.class_350.method_25311(class_350.java:311)

at knot//net.minecraft.class_350.method_48579(class_350.java:180)

at knot//net.minecraft.class_339.method_25394(class_339.java:66)

at knot//net.wurstclient.clickgui.screens.EditBookOffersScreen.method_25394(EditBookOffersScreen.java:150)

at knot//net.minecraft.class_437.method_47413(class_437.java:113)

at knot//net.minecraft.class_757.mixinextras$bridge$method_47413$61(class_757.java)

at knot//net.minecraft.class_757.wrapOperation$zod000$fabric-screen-api-v1$onRenderScreen(class_757.java:923)

at knot//net.minecraft.class_757.method_3192(class_757.java:549)

at knot//net.minecraft.class_310.method_1523(class_310.java:1361)

at knot//net.minecraft.class_310.method_1514(class_310.java:947)

at knot//net.minecraft.client.main.Main.main(Main.java:265)

at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:506)

at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:72)

at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23)