The game crashed whilst exception in server tick loop Error: java.util.concurrent.CompletionException: java.lang.NullPointerException: Cannot invoke "com.mojang.datafixers.util.Either.left()" because "either" is null Exit Code: -1---- Minecraft Crash Report ---- // You should try our sister game, Minceraft! Time: 05/01/2022, 18:02 Description: Exception in server tick loop java.util.concurrent.CompletionException: java.lang.NullPointerException: Cannot invoke "com.mojang.datafixers.util.Either.left()" because "either" is null at java.base/java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:315) at java.base/java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:320) at java.base/java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:649) at java.base/java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:510) at java.base/java.util.concurrent.CompletableFuture.postFire(CompletableFuture.java:614) at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1163) at java.base/java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:482) at net.minecraft.class_3900.method_17634(class_3900.java:58) at net.minecraft.class_3846.method_16907(class_3846.java:91) at net.minecraft.class_3846.method_16900(class_3846.java:146) at net.minecraft.class_3846.run(class_3846.java:102) at java.base/java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1395) at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:373) at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1182) at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1655) at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1622) at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:165) Caused by: java.lang.NullPointerException: Cannot invoke "com.mojang.datafixers.util.Either.left()" because "either" is null at net.minecraft.class_3898.method_17215(class_3898.java:322) at java.base/java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:646) ... 14 more A detailed walkthrough of the error, its code path and all known details is as follows: --------------------------------------------------------------------------------------- -- System Details -- Details: Minecraft Version: 1.18.1 Minecraft Version ID: 1.18.1 Operating System: Windows 10 (amd64) version 10.0 Java Version: 17.0.1, Microsoft Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Microsoft Memory: 5061257088 bytes (4826 MiB) / 7180648448 bytes (6848 MiB) up to 12884901888 bytes (12288 MiB) CPUs: 24 Processor Vendor: GenuineIntel Processor Name: Intel(R) Core(TM) i9-10920X CPU @ 3.50GHz Identifier: Intel64 Family 6 Model 85 Stepping 7 Microarchitecture: Cascade Lake Frequency (GHz): 3.50 Number of physical packages: 1 Number of physical CPUs: 12 Number of logical CPUs: 24 Graphics card #0 name: NVIDIA GeForce RTX 2080 Ti Graphics card #0 vendor: NVIDIA (0x10de) Graphics card #0 VRAM (MB): 4095.00 Graphics card #0 deviceId: 0x1e07 Graphics card #0 versionInfo: DriverVersion=30.0.14.7168 Memory slot #0 capacity (MB): 8192.00 Memory slot #0 clockSpeed (GHz): 3.60 Memory slot #0 type: DDR4 Memory slot #1 capacity (MB): 8192.00 Memory slot #1 clockSpeed (GHz): 3.60 Memory slot #1 type: DDR4 Memory slot #2 capacity (MB): 8192.00 Memory slot #2 clockSpeed (GHz): 3.60 Memory slot #2 type: DDR4 Memory slot #3 capacity (MB): 8192.00 Memory slot #3 clockSpeed (GHz): 3.60 Memory slot #3 type: DDR4 Virtual memory max (MB): 41150.01 Virtual memory used (MB): 20016.39 Swap memory total (MB): 8704.00 Swap memory used (MB): 0.00 JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx12G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M Fabric Mods: fabric: Fabric API 0.44.0+1.18 fabric-api-base: Fabric API Base 0.4.1+b4f4f6cdc8 fabric-api-lookup-api-v1: Fabric API Lookup API (v1) 1.4.0+16d92c47c8 fabric-biome-api-v1: Fabric Biome API (v1) 6.0.1+ded849a9c8 fabric-blockrenderlayer-v1: Fabric BlockRenderLayer Registration (v1) 1.1.9+3ac43d95c8 fabric-command-api-v1: Fabric Command API (v1) 1.1.6+3ac43d95c8 fabric-commands-v0: Fabric Commands (v0) 0.2.5+b4f4f6cdc8 fabric-containers-v0: Fabric Containers (v0) 0.1.18+d154e2c6c8 fabric-content-registries-v0: Fabric Content Registries (v0) 0.4.5+6f53a73dc8 fabric-crash-report-info-v1: Fabric Crash Report Info (v1) 0.1.8+3ac43d95c8 fabric-dimensions-v1: Fabric Dimensions API (v1) 2.1.7+43d29571c8 fabric-entity-events-v1: Fabric Entity Events (v1) 1.4.5+6b21378ac8 fabric-events-interaction-v0: Fabric Events Interaction (v0) 0.4.16+bfa23f17c8 fabric-events-lifecycle-v0: Fabric Events Lifecycle (v0) 0.2.6+b4f4f6cdc8 fabric-game-rule-api-v1: Fabric Game Rule API (v1) 1.0.10+3ac43d95c8 fabric-item-api-v1: Fabric Item API (v1) 1.3.0+691a79b5c8 fabric-item-groups-v0: Fabric Item Groups (v0) 0.3.3+3ac43d95c8 fabric-key-binding-api-v1: Fabric Key Binding API (v1) 1.0.8+c8aba2f3c8 fabric-keybindings-v0: Fabric Key Bindings (v0) 0.2.6+b4f4f6cdc8 fabric-lifecycle-events-v1: Fabric Lifecycle Events (v1) 1.4.10+c15ca335c8 fabric-loot-tables-v1: Fabric Loot Tables (v1) 1.0.8+3ac43d95c8 fabric-mining-level-api-v1: Fabric Mining Level API (v1) 1.0.3+3ac43d95c8 fabric-mining-levels-v0: Fabric Mining Levels (v0) 0.1.7+b4f4f6cdc8 fabric-models-v0: Fabric Models (v0) 0.3.3+3ac43d95c8 fabric-networking-api-v1: Fabric Networking API (v1) 1.0.18+3ac43d95c8 fabric-networking-v0: Fabric Networking (v0) 0.3.5+b4f4f6cdc8 fabric-object-builder-api-v1: Fabric Object Builder API (v1) 1.11.0+3b82842ec8 fabric-object-builders-v0: Fabric Object Builders (v0) 0.7.8+3ac43d95c8 fabric-particles-v1: Fabric Particles (v1) 0.2.9+526dc1acc8 fabric-registry-sync-v0: Fabric Registry Sync (v0) 0.8.5+3ac43d95c8 fabric-renderer-api-v1: Fabric Renderer API (v1) 0.4.9+3ac43d95c8 fabric-renderer-indigo: Fabric Renderer - Indigo 0.4.12+3ac43d95c8 fabric-renderer-registries-v1: Fabric Renderer Registries (v1) 3.2.7+b4f4f6cdc8 fabric-rendering-data-attachment-v1: Fabric Rendering Data Attachment (v1) 0.3.4+7242e9d7c8 fabric-rendering-fluids-v1: Fabric Rendering Fluids (v1) 0.1.18+3ac43d95c8 fabric-rendering-v0: Fabric Rendering (v0) 1.1.9+b4f4f6cdc8 fabric-rendering-v1: Fabric Rendering (v1) 1.10.3+6b21378ac8 fabric-resource-loader-v0: Fabric Resource Loader (v0) 0.4.11+3ac43d95c8 fabric-screen-api-v1: Fabric Screen API (v1) 1.0.7+3ac43d95c8 fabric-screen-handler-api-v1: Fabric Screen Handler API (v1) 1.1.11+3ac43d95c8 fabric-structure-api-v1: Fabric Structure API (v1) 2.0.8+295197a7c8 fabric-tag-extensions-v0: Fabric Tag Extensions (v0) 1.2.5+3ac43d95c8 fabric-textures-v0: Fabric Textures (v0) 1.0.9+3ac43d95c8 fabric-tool-attribute-api-v1: Fabric Tool Attribute API (v1) 1.3.4+7de09f55c8 fabric-transfer-api-v1: Fabric Transfer API (v1) 1.5.5+b4f4f6cdc8 fabricloader: Fabric Loader 0.12.11 java: OpenJDK 64-Bit Server VM 17 litematica: Litematica 0.0.0-dev.20211201.215732 malilib: MaLiLib 0.10.0-dev.27 minecraft: Minecraft 1.18.1 mm: Manningham Mills 2.3 optifabric: OptiFabric 1.12.10 replaymod: Replay Mod 1.18.1-2.6.3 voicechat: Simple Voice Chat 1.18.1-2.1.22 worldedit: WorldEdit 7.2.8-SNAPSHOT+6007-22816cf Server Running: true Player Count: 1 / 8; [class_3222['AdieCraft'/1, l='ServerLevel[Futuristic Update 1.18]', x=-406.69, y=67.85, z=-59.49]] Data Packs: vanilla, Fabric Mods Type: Integrated Server (map_client.txt) Is Modded: Definitely; Client brand changed to 'fabric'; Server brand changed to 'fabric' OptiFine Version: OptiFine_1.18.1_HD_U_H4 OptiFine Build: 20211212-175054 Render Distance Chunks: 24 Mipmaps: 4 Anisotropic Filtering: 1 Antialiasing: 0 Multitexture: false Shaders: null OpenGlVersion: 3.2.0 NVIDIA 471.68 OpenGlRenderer: NVIDIA GeForce RTX 2080 Ti/PCIe/SSE2 OpenGlVendor: NVIDIA Corporation CpuCount: 24 -- OptiFabric -- Details: OptiFine jar designed for: 1.18.1 OptiFine jar version: OptiFine_1.18.1_HD_U_H4 OptiFine jar status: Valid OptiFine installer OptiFine remapped jar: C:/Users/adiek/AppData/Roaming/.minecraft/.optifine/OptiFine_1.18.1_HD_U_H4/Optifine-mapped.jar OptiFabric error: