The crash report indicates that the error is caused by a NullPointerException in the getPacks method of the BuiltInDataPacks class from the cristellib library. The exception occurs because the pack object is null. Here is the relevant part of the report:
java.lang.NullPointerException: Cannot invoke "net.minecraft.class_3262.method_14406(net.minecraft.class_3264)" because "pack" is null
at net.cristellib.builtinpacks.BuiltInDataPacks.getPacks(BuiltInDataPacks.java:41)
at net.fabricmc.fabric.impl.resource.loader.ModResourcePackCreator.handler$zje000$cristellib$loadPacks(ModResourcePackCreator.java:525)
...
The crash report indicates that the error is caused by a NullPointerException in the getPacks method of the BuiltInDataPacks class from the cristellib library. The exception occurs because the pack object is null. Here is the relevant part of the report:
java.lang.NullPointerException: Cannot invoke "net.minecraft.class_3262.method_14406(net.minecraft.class_3264)" because "pack" is null at net.cristellib.builtinpacks.BuiltInDataPacks.getPacks(BuiltInDataPacks.java:41) at net.fabricmc.fabric.impl.resource.loader.ModResourcePackCreator.handler$zje000$cristellib$loadPacks(ModResourcePackCreator.java:525) ...