got a random server crash, not sure why or what lead up to it, but it names klee slabs in the crash log, using klee slabs version 7.4.5 on forge 27.0.13 with some other mods present, they are listed in the log below.

---- Minecraft Crash Report ----
// I'm sorry, Dave.

Time: 7/2/19 11:12 PM
Description: Ticking entity

java.lang.NullPointerException: Cannot get config value without assigned Config object present
at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:787) ~[server-1.14.3-extra.jar:?] {}
at net.minecraftforge.common.ForgeConfigSpec$ConfigValue.get(ForgeConfigSpec.java:673) ~[?:?] {}
at net.blay09.mods.kleeslabs.KleeSlabs.isPlayerKleeSlabbing(KleeSlabs.java:42) ~[?:7.4.5] {}
at net.blay09.mods.kleeslabs.BlockBreakHandler.onBreakBlock(BlockBreakHandler.java:32) ~[?:7.4.5] {}
at net.minecraftforge.eventbus.ASMEventHandler_25_BlockBreakHandler_onBreakBlock_BreakEvent.invoke(.dynamic) ~[?:?] {}
at net.minecraftforge.eventbus.ASMEventHandler.invoke(ASMEventHandler.java:80) ~[eventbus-0.10.1-service.jar:?] {}
at net.minecraftforge.eventbus.EventBus.post(EventBus.java:258) ~[eventbus-0.10.1-service.jar:?] {}
at net.minecraftforge.common.ForgeHooks.onBlockBreakEvent(ForgeHooks.java:560) ~[?:?] {}
at net.minecraft.server.management.PlayerInteractionManager.func_180237_b(PlayerInteractionManager.java:220) ~[?:?] {}
at net.minecraft.server.management.PlayerInteractionManager.func_73075_a(PlayerInteractionManager.java:89) ~[?:?] {}
at net.minecraft.entity.player.ServerPlayerEntity.func_70071_h_(ServerPlayerEntity.java:315) ~[?:?] {pl:accesstransformer:B}
at net.minecraft.world.ServerWorld.func_217479_a(ServerWorld.java:574) ~[?:?] {pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.world.World.func_217390_a(World.java:684) ~[?:?] {pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.world.ServerWorld.func_72835_b(ServerWorld.java:381) ~[?:?] {pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:813) ~[?:?] {pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:324) ~[?:?] {pl:accesstransformer:B}
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:748) ~[?:?] {pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:609) [?:?] {pl:accesstransformer:B,pl:runtimedistcleaner:A}
at java.lang.Thread.run(Unknown Source) [?:1.8.0_211] {}

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

-- Head --
Thread: Server thread
Stacktrace:
at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:787)
at net.minecraftforge.common.ForgeConfigSpec$ConfigValue.get(ForgeConfigSpec.java:673)
at net.blay09.mods.kleeslabs.KleeSlabs.isPlayerKleeSlabbing(KleeSlabs.java:42)
at net.blay09.mods.kleeslabs.BlockBreakHandler.onBreakBlock(BlockBreakHandler.java:32)
at net.minecraftforge.eventbus.ASMEventHandler_25_BlockBreakHandler_onBreakBlock_BreakEvent.invoke(.dynamic)
at net.minecraftforge.eventbus.ASMEventHandler.invoke(ASMEventHandler.java:80)
at net.minecraftforge.eventbus.EventBus.post(EventBus.java:258)
at net.minecraftforge.common.ForgeHooks.onBlockBreakEvent(ForgeHooks.java:560)
at net.minecraft.server.management.PlayerInteractionManager.func_180237_b(PlayerInteractionManager.java:220)
at net.minecraft.server.management.PlayerInteractionManager.func_73075_a(PlayerInteractionManager.java:89)
at net.minecraft.entity.player.ServerPlayerEntity.func_70071_h_(ServerPlayerEntity.java:315)
at net.minecraft.world.ServerWorld.func_217479_a(ServerWorld.java:574)

-- Entity being ticked --
Details:
Entity Type: minecraft:player (net.minecraft.entity.player.ServerPlayerEntity)
Entity ID: 24
Entity Name: Cutiepiekb
Entity's Exact location: 75.17, 45.50, -558.26
Entity's Block location: World: (75,45,-559), Chunk: (at 11,2,1 in 4,-35; contains blocks 64,0,-560 to 79,255,-545), Region: (0,-2; contains chunks 0,-64 to 31,-33, blocks 0,0,-1024 to 511,255,-513)
Entity's Momentum: 0.00, -0.08, 0.00
Entity's Passengers: []
Entity's Vehicle: ERROR NullPointerException: null
Stacktrace:
at net.minecraft.world.World.func_217390_a(World.java:684)
at net.minecraft.world.ServerWorld.func_72835_b(ServerWorld.java:381)

-- Affected level --
Details:
All players: 2 total; [ServerPlayerEntity['Cutiepiekb'/24, l='kamsooner', x=75.17, y=45.50, z=-558.26], ServerPlayerEntity['cpm9'/201, l='kamsooner', x=60.50, y=57.00, z=-543.14]]
Chunk stats: ServerChunkCache: 4017
Level dimension: DimensionType{minecraft:overworld}
Level name: kamsooner
Level seed: -1041131072322514678
Level generator: ID 00 - default, ver 1. Features enabled: true
Level generator options: {}
Level spawn location: World: (-16,64,-256), Chunk: (at 0,4,0 in -1,-16; contains blocks -16,0,-256 to -1,255,-241), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
Level time: 13498311 game time, 1723984 day time
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 23814 (now: false), thunder time: 84930 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:813)
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:324)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:748)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:609)
at java.lang.Thread.run(Unknown Source)

-- System Details --
Details:
Minecraft Version: 1.14.3
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_211, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 2653723416 bytes (2530 MB) / 3419930624 bytes (3261 MB) up to 5726797824 bytes (5461 MB)
JVM Flags: 2 total; -Xmx6G -Xms2G
FML: New FML!
Loaded coremods (and transformers): Nothing
Player Count: 2 / 2; [ServerPlayerEntity['Cutiepiekb'/24, l='kamsooner', x=75.17, y=45.50, z=-558.26], ServerPlayerEntity['cpm9'/201, l='kamsooner', x=60.50, y=57.00, z=-543.14]]
Data Packs: mod:kleeslabs, mod:hardcorerevival, mod:fastleafdecay, mod:practicaltools, mod:fleshtoleather, mod:waddles, mod:tramplestopper, mod:reap, mod:ping, mod:gamemodeoverhaul, mod:elevatorid, mod:dde, mod:biomeinfo, mod:voxelmap, mod:jei, mod:worldedit, mod:forge, vanilla
Is Modded: Definitely; Server brand changed to 'forge'
Type: Dedicated Server (map_server.txt)