I've been using litematica for almost 6 months now and I've never had any problems with crashing. all of a sudden it just started crashing today. It crashes when I load a world or go multiplayer. When I woke up it didn't crash. Here's the crash report. Im using Wurst Client, World Edit Fabric mod, and Litematica.

Crash report:

---- Minecraft Crash Report ----
// Daisy, daisy...

Time: 1/11/21 5:28 PM
Description: Unexpected error

java.lang.NullPointerException: Unexpected error
at fi.dy.masa.litematica.render.schematic.WorldRendererSchematic.setupTerrain(WorldRendererSchematic.java:218)
at fi.dy.masa.litematica.render.LitematicaRenderer.piecewisePrepareAndUpdate(LitematicaRenderer.java:321)
at net.minecraft.class_761.handler$zkl000$onPostSetupTerrain(class_761.java:5115)
at net.minecraft.class_761.method_3273(class_761.java:1401)
at net.minecraft.class_761.method_22710(class_761.java:1552)
at net.minecraft.class_757.method_3188(class_757.java:1022)
at net.minecraft.class_757.method_3192(class_757.java:693)
at net.minecraft.class_310.method_1523(class_310.java:1048)
at net.minecraft.class_310.method_1514(class_310.java:681)
at net.minecraft.client.main.Main.main(Main.java:215)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at net.fabricmc.loader.game.MinecraftGameProvider.launch(MinecraftGameProvider.java:224)
at net.fabricmc.loader.launch.knot.Knot.init(Knot.java:141)
at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:27)

A detailed walkthrough of the error, its code path and all known details is as follows:

-- Head --
Thread: Render thread
Stacktrace:
at fi.dy.masa.litematica.render.schematic.WorldRendererSchematic.setupTerrain(WorldRendererSchematic.java:218)
at fi.dy.masa.litematica.render.LitematicaRenderer.piecewisePrepareAndUpdate(LitematicaRenderer.java:321)
at net.minecraft.class_761.handler$zkl000$onPostSetupTerrain(class_761.java:5115)
at net.minecraft.class_761.method_3273(class_761.java:1401)
at net.minecraft.class_761.method_22710(class_761.java:1552)
at net.minecraft.class_757.method_3188(class_757.java:1022)

-- Affected level --
Details:
All players: 1 total; [class_746['Shizzins'/17, l='ClientLevel', x=378.10, y=101.30, z=-178.72]]
Chunk stats: Client Chunk Cache: 1089, 517
Level dimension: minecraft:overworld
Level spawn location: World: (395,13,-97), Chunk: (at 11,0,15 in 24,-7; contains blocks 384,0,-112 to 399,255,-97), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
Level time: 77778 game time, 10613 day time
Server brand: fabric
Server type: Integrated singleplayer server
Stacktrace:
at net.minecraft.class_638.method_8538(class_638.java:617)
at net.minecraft.class_310.method_1587(class_310.java:2239)
at net.minecraft.class_310.method_1514(class_310.java:704)
at net.minecraft.client.main.Main.main(Main.java:215)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at net.fabricmc.loader.game.MinecraftGameProvider.launch(MinecraftGameProvider.java:224)
at net.fabricmc.loader.launch.knot.Knot.init(Knot.java:141)
at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:27)

-- System Details --
Details:
Minecraft Version: 1.16.4
Minecraft Version ID: 1.16.4
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 1643229248 bytes (1567 MB) / 3456106496 bytes (3296 MB) up to 8589934592 bytes (8192 MB)
CPUs: 12
JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx8G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
Fabric Mods:
baritoe: Baritone 1.6.1
fabric: Fabric API 0.28.3+1.16
fabric-api-base: Fabric API Base 0.2.0+ab87788d3a
fabric-biome-api-v1: Fabric Biome API (v1) 3.1.0+2e23b97c3a
fabric-blockrenderlayer-v1: Fabric BlockRenderLayer Registration (v1) 1.1.4+6a2618f53a
fabric-command-api-v1: Fabric Command API (v1) 1.0.9+6a2618f53a
fabric-commands-v0: Fabric Commands (v0) 0.2.0+6a2618f53a
fabric-containers-v0: Fabric Containers (v0) 0.1.9+a03e98793a
fabric-content-registries-v0: Fabric Content Registries (v0) 0.2.0+e77439c73a
fabric-crash-report-info-v1: Fabric Crash Report Info (v1) 0.1.2+b7f9825d3a
fabric-dimensions-v1: fabric-dimensions-v1 2.0.1+9a6c75813a
fabric-events-interaction-v0: Fabric Events Interaction (v0) 0.4.1+6a2618f53a
fabric-events-lifecycle-v0: Fabric Events Lifecycle (v0) 0.2.0+6a2618f53a
fabric-game-rule-api-v1: Fabric Game Rule API (v1) 1.0.3+a4467d2a3a
fabric-item-api-v1: Fabric Item API (v1) 1.2.0+6a2618f53a
fabric-item-groups-v0: Fabric Item Groups (v0) 0.2.1+6a2618f53a
fabric-key-binding-api-v1: Fabric Key Binding API (v1) 1.0.1+730711c63a
fabric-keybindings-v0: Fabric Key Bindings (v0) 0.2.0+6a2618f53a
fabric-lifecycle-events-v1: Fabric Lifecycle Events (v1) 1.2.0+74cc3b2095
fabric-loot-tables-v1: Fabric Loot Tables (v1) 1.0.1+6a2618f53a
fabric-mining-levels-v0: Fabric Mining Levels (v0) 0.1.2+6a2618f53a
fabric-models-v0: Fabric Models (v0) 0.1.1+6a2618f53a
fabric-networking-api-v1: Fabric Networking API (v1) 1.0.0+4358fbc63a
fabric-networking-blockentity-v0: Fabric Networking Block Entity (v0) 0.2.7+a03e98793a
fabric-networking-v0: Fabric Networking (v0) 0.3.1+2a4333d33a
fabric-object-builder-api-v1: Fabric Object Builder API (v1) 1.9.2+6a2618f53a
fabric-object-builders-v0: Fabric Object Builders (v0) 0.7.1+6a2618f53a
fabric-particles-v1: fabric-particles-v1 0.2.2+6a2618f53a
fabric-registry-sync-v0: Fabric Registry Sync (v0) 0.7.3+be155ae23a
fabric-renderer-api-v1: Fabric Renderer API (v1) 0.3.3+6a2618f53a
fabric-renderer-indigo: Fabric Renderer - Indigo 0.4.3+6a2618f53a
fabric-renderer-registries-v1: Fabric Renderer Registries (v1) 2.2.0+6a2618f53a
fabric-rendering-data-attachment-v1: Fabric Rendering Data Attachment (v1) 0.1.4+6a2618f53a
fabric-rendering-fluids-v1: Fabric Rendering Fluids (v1) 0.1.12+6a2618f53a
fabric-rendering-v0: Fabric Rendering (v0) 1.1.1+6a2618f53a
fabric-rendering-v1: Fabric Rendering (v1) 1.4.0+6a2618f53a
fabric-resource-loader-v0: Fabric Resource Loader (v0) 0.3.2+1944f3e03a
fabric-screen-handler-api-v1: Fabric Screen Handler API (v1) 1.1.0+6a2618f53a
fabric-structure-api-v1: Fabric Structure API (v1) 1.1.1+f1d8af063a
fabric-tag-extensions-v0: Fabric Tag Extensions (v0) 1.1.0+e77439c73a
fabric-textures-v0: Fabric Textures (v0) 1.0.5+6a2618f53a
fabric-tool-attribute-api-v1: Fabric Tool Attribute API (v1) 1.2.5+6a2618f53a
fabricloader: Fabric Loader 0.10.8
litematica: Litematica 0.0.0-dev.20201103.184101
malilib: MaLiLib 0.10.0-dev.21+arne.2
minecraft: Minecraft 1.16.4
mm: Manningham Mills 2.1
optifabric: OptiFabric 1.8.13
worldedit: WorldEdit 7.2.1+299386a
wurst: Wurst Client v7.9-MC1.16.4
Launched Version: fabric-loader-0.10.8-1.16.4
Backend library: LWJGL version 3.2.2 build 10
Backend API: AMD Radeon RX 5700 XT GL version 4.6.14757 Compatibility Profile Context 20.12.1 27.20.14501.28009, ATI Technologies Inc.
GL Caps: Using framebuffer using OpenGL 3.0
Using VBOs: Yes
Is Modded: Definitely; Client brand changed to 'fabric'
Type: Client (map_client.txt)
Graphics mode: fancy
Resource Packs: fabric/fabric-renderer-api-v1, fabric/fabric-keybindings-v0, fabric/fabricloader, fabric/fabric-containers-v0, fabric/fabric-object-builder-api-v1, fabric/fabric-game-rule-api-v1, fabric/fabric-api-base, fabric/mm, fabric/fabric-rendering-data-attachment-v1, fabric/fabric-textures-v0, fabric/fabric-rendering-fluids-v1, fabric/fabric-blockrenderlayer-v1, fabric/fabric-lifecycle-events-v1, fabric/fabric-renderer-registries-v1, fabric/fabric-loot-tables-v1, fabric/fabric, fabric/fabric-networking-v0, fabric/fabric-screen-handler-api-v1, fabric/fabric-networking-blockentity-v0, fabric/fabric-command-api-v1, fabric/fabric-tool-attribute-api-v1, fabric/fabric-renderer-indigo, fabric/fabric-events-interaction-v0, fabric/fabric-item-api-v1, fabric/fabric-crash-report-info-v1, fabric/fabric-rendering-v0, fabric/fabric-rendering-v1, fabric/fabric-key-binding-api-v1, fabric/fabric-resource-loader-v0, fabric/fabric-content-registries-v0, fabric/fabric-tag-extensions-v0, fabric/optifabric, fabric/fabric-biome-api-v1, fabric/fabric-registry-sync-v0, fabric/fabric-mining-levels-v0, fabric/fabric-networking-api-v1, fabric/fabric-events-lifecycle-v0, fabric/wurst, fabric/fabric-models-v0, fabric/fabric-item-groups-v0, fabric/fabric-object-builders-v0
Current Language: English (US)
CPU: 12x AMD Ryzen 5 3600 6-Core Processor
OptiFine Version: OptiFine_1.16.4_HD_U_G5
OptiFine Build: 20201106-171901
Render Distance Chunks: 14
Mipmaps: 4
Anisotropic Filtering: 1
Antialiasing: 0
Multitexture: false
Shaders: BSL_v7.2.zip
OpenGlVersion: 4.6.14757 Compatibility Profile Context 20.12.1 27.20.14501.28009
OpenGlRenderer: AMD Radeon RX 5700 XT
OpenGlVendor: ATI Technologies Inc.
CpuCount: 12

-- OptiFabric --
Details:
OptiFine jar designed for: 1.16.4
OptiFine jar version: OptiFine_1.16.4_HD_U_G5
OptiFine jar status: Valid OptiFine installer
OptiFine remapped jar: C:\Users\rjdoy\AppData\Roaming.minecraft.optifine\OptiFine_1.16.4_HD_U_G5\Optifine-mapped.jar
OptiFabric error:

I believe this crash is caused by the Fabric hiding option whatever it's called in Wurst, at least someone reported disabling that option fixing a similar crash.