my character is the ticking entity. if you could fix this in your next update i would appreciate it. i can back to you with info if you know what you need.

the ticking error crashes the game

Crash log?

Dont worry too much it probably has to do with version error. I have been trying to make a nether modpack for the new version. Your mod would be a great addition I'll send you a zip of what I have so far if you want its single player for now.

---- Minecraft Crash Report ----
// Why did you do that?

Time: 5/6/20 11:22 AM
Description: Ticking entity

java.lang.NoSuchMethodError: net.minecraft.class_746.method_5812()Lnet/minecraft/class_243;
at net.minecraft.class_746.doDoubleJump(class_746.java:1749)
at net.minecraft.class_746.handler$zdl000$doubleJumpTickMovement(class_746.java:1743)
at net.minecraft.class_746.method_6007(class_746.java:813)
at net.minecraft.class_1309.method_5773(class_1309.java:2216)
at net.minecraft.class_1657.method_5773(class_1657.java:273)
at net.minecraft.class_746.method_5773(class_746.java:201)
at net.minecraft.class_638.method_18646(class_638.java:177)
at net.minecraft.class_638$$Lambda$4067/257099532.accept(Unknown Source)
at net.minecraft.class_1937.method_18472(class_1937.java:577)
at net.minecraft.class_638.method_18116(class_638.java:148)
at net.minecraft.class_310.method_1574(class_310.java:1508)
at net.minecraft.class_310.method_1523(class_310.java:978)
at net.minecraft.class_310.method_1514(class_310.java:633)
at net.minecraft.client.main.Main.main(Main.java:204)
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:192)
at net.fabricmc.loader.launch.knot.Knot.init(Knot.java:140)
at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:26)

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

-- Head --
Thread: Render thread
Stacktrace:
at net.minecraft.class_746.doDoubleJump(class_746.java:1749)
at net.minecraft.class_746.handler$zdl000$doubleJumpTickMovement(class_746.java:1743)
at net.minecraft.class_746.method_6007(class_746.java:813)
at net.minecraft.class_1309.method_5773(class_1309.java:2216)
at net.minecraft.class_1657.method_5773(class_1657.java:273)
at net.minecraft.class_746.method_5773(class_746.java:201)
at net.minecraft.class_638.method_18646(class_638.java:177)
at net.minecraft.class_638$$Lambda$4067/257099532.accept(Unknown Source)

-- Entity being ticked --
Details:
Entity Type: minecraft:player (net.minecraft.class_746)
Entity ID: 187
Entity Name: Worgric
Entity's Exact location: -49.50, 73.00, -197.50
Entity's Block location: World: (-50,73,-198), Chunk: (at 14,4,10 in -4,-13; contains blocks -64,0,-208 to -49,255,-193), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
Entity's Momentum: 0.00, -0.08, 0.00
Entity's Passengers: []
Entity's Vehicle: ERROR NullPointerException: null
Stacktrace:
at net.minecraft.class_1937.method_18472(class_1937.java:577)
at net.minecraft.class_638.method_18116(class_638.java:148)

-- Affected level --
Details:
All players: 1 total; [class_746['Worgric'/187, l='MpServer', x=-49.50, y=73.00, z=-197.50]]
Chunk stats: Client Chunk Cache: 841, 462
Level dimension: minecraft:overworld
Level name: MpServer
Level seed: 5940948888331641326
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options: NBT[{}]
Level spawn location: World: (-48,67,-208), Chunk: (at 0,4,0 in -3,-13; contains blocks -48,0,-208 to -33,255,-193), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
Level time: 150 game time, 150 day time
Known server brands:
Level was modded: false
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Server brand: fabric
Server type: Integrated singleplayer server
Stacktrace:
at net.minecraft.class_638.method_8538(class_638.java:431)
at net.minecraft.class_310.method_1587(class_310.java:1977)
at net.minecraft.class_310.method_1514(class_310.java:651)
at net.minecraft.client.main.Main.main(Main.java:204)
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:192)
at net.fabricmc.loader.launch.knot.Knot.init(Knot.java:140)
at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:26)

-- System Details --
Details:
Minecraft Version: 20w16a
Minecraft Version ID: 20w16a
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: 923274760 bytes (880 MB) / 1577058304 bytes (1504 MB) up to 2147483648 bytes (2048 MB)
CPUs: 4
JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
Fabric Mods:
fabric: Fabric API 0.5.11+build.322-1.16
fabric-api-base: Fabric API Base 0.1.3+12a8474cad
fabric-biomes-v1: Fabric Biomes (v1) 0.2.1+b7d52fa5ad
fabric-blockrenderlayer-v1: Fabric BlockRenderLayer Registration (v1) 1.1.4+c6a8ea89ad
fabric-commands-v0: Fabric Commands (v0) 0.1.4+a2a96bf9ad
fabric-containers-v0: Fabric Containers (v0) 0.1.7+d249f7b6ad
fabric-content-registries-v0: Fabric Content Registries (v0) 0.1.5+88afe607ad
fabric-crash-report-info-v1: Fabric Crash Report Info (v1) 0.1.2+b7f9825dad
fabric-dimensions-v1: fabric-dimensions-v1 0.3.3+a2a96bf9ad
fabric-events-interaction-v0: Fabric Events Interaction (v0) 0.3.0+04b99794ad
fabric-events-lifecycle-v0: Fabric Events Lifecycle (v0) 0.1.2+1a47cd78ad
fabric-item-groups-v0: Fabric Item Groups (v0) 0.1.10+d249f7b6ad
fabric-keybindings-v0: Fabric Key Bindings (v0) 0.1.1+dfdb52d6ad
fabric-loot-tables-v1: Fabric Loot Tables (v1) 0.1.6+2f56dff2ad
fabric-mining-levels-v0: Fabric Mining Levels (v0) 0.1.2+5b8a535aad
fabric-models-v0: Fabric Models (v0) 0.1.0+dfdb52d6ad
fabric-networking-blockentity-v0: Fabric Networking Block Entity (v0) 0.2.5+b50ffc7bad
fabric-networking-v0: Fabric Networking (v0) 0.1.9+1a47cd78ad
fabric-object-builders-v0: Fabric Object Builders (v0) 0.2.4+eb276f9cad
fabric-particles-v1: fabric-particles-v1 0.1.2+12a8474cad
fabric-registry-sync-v0: Fabric Registry Sync (v0) 0.2.10+eb276f9cad
fabric-renderer-api-v1: Fabric Renderer API (v1) 0.2.12+12a8474cad
fabric-renderer-indigo: Fabric Renderer - Indigo 0.2.28+c808269fad
fabric-renderer-registries-v1: Fabric Renderer Registries (v1) 2.0.1+5a0f9a60ad
fabric-rendering-data-attachment-v1: Fabric Rendering Data Attachment (v1) 0.1.3+b7f9825dad
fabric-rendering-fluids-v1: Fabric Rendering Fluids (v1) 0.1.7+12a8474cad
fabric-rendering-v0: Fabric Rendering (v0) 1.1.0+53410490ad
fabric-rendering-v1: Fabric Rendering (v1) 0.1.1+1a47cd78ad
fabric-resource-loader-v0: Fabric Resource Loader (v0) 0.1.13+94c7834aad
fabric-tag-extensions-v0: Fabric Tag Extensions (v0) 0.2.3+9cd8d660ad
fabric-textures-v0: Fabric Textures (v0) 1.0.4+821cdba7ad
fabricloader: Fabric Loader 0.8.2+build.194
minecraft: Minecraft 1.16-alpha.20.16.a
org_aeonbits_owner_owner: owner 1.0.8
walljump: Wall-Jump! 1.3.3+20w07a
Launched Version: fabric-loader-0.8.2+build.194-20w16a
Backend library: LWJGL version 3.2.2 build 10
Backend API: GeForce GTX 1060 6GB/PCIe/SSE2 GL version 4.6.0 NVIDIA 432.00, NVIDIA Corporation
GL Caps: Using framebuffer using OpenGL 3.0
Using VBOs: Yes
Is Modded: Definitely; Client brand changed to 'fabric'
Type: Client (map_client.txt)
Resource Packs: vanilla
Current Language: English (US)
CPU: 4x AMD Ryzen 3 2300X Quad-Core Processor

Nether Nomad 0.13.zip I hope you enjoy