Our server keeps crashing repeatedly every few hours. I believe the issue is with lichen conversion, because of the crash reports. Here is the entire crash report.

---- Minecraft Crash Report ----
// Uh... Did I do that?

Time: 7/21/21 12:57 AM
Description: Exception ticking world

java.lang.NullPointerException: Exception ticking world
at net.lilycorgitaco.unearthed.block.LichenBlock.tryErodeBlock(LichenBlock.java:141)
at net.lilycorgitaco.unearthed.block.LichenBlock.method_9514(LichenBlock.java:95)
at net.minecraft.class_4970$class_4971.method_26199(class_4970.java:878)
at net.minecraft.class_3218.redirect$zfm000$redirectBlockStateTick(class_3218.java:2083)
at net.minecraft.class_3218.method_18203(class_3218.java:522)
at net.minecraft.class_3215.method_20801(class_3215.java:390)
at java.util.ArrayList.forEach(ArrayList.java:1259)
at net.minecraft.class_3215.method_14161(class_3215.java:368)
at net.minecraft.class_3215.method_12127(class_3215.java:337)
at net.minecraft.class_3218.method_18765(class_3218.java:353)
at net.minecraft.server.MinecraftServer.method_3813(MinecraftServer.java:871)
at net.minecraft.class_3176.method_3813(class_3176.java:312)
at net.minecraft.server.MinecraftServer.method_3748(MinecraftServer.java:811)
at net.minecraft.server.MinecraftServer.method_29741(MinecraftServer.java:670)
at net.minecraft.server.MinecraftServer.method_29739(MinecraftServer.java:257)
at java.lang.Thread.run(Thread.java:748)

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

-- Head --
Thread: Server thread
Stacktrace:
at net.lilycorgitaco.unearthed.block.LichenBlock.tryErodeBlock(LichenBlock.java:141)
at net.lilycorgitaco.unearthed.block.LichenBlock.method_9514(LichenBlock.java:95)
at net.minecraft.class_4970$class_4971.method_26199(class_4970.java:878)
at net.minecraft.class_3218.redirect$zfm000$redirectBlockStateTick(class_3218.java:2083)
at net.minecraft.class_3218.method_18203(class_3218.java:522)
at net.minecraft.class_3215.method_20801(class_3215.java:390)
at java.util.ArrayList.forEach(ArrayList.java:1259)
at net.minecraft.class_3215.method_14161(class_3215.java:368)
at net.minecraft.class_3215.method_12127(class_3215.java:337)
at net.minecraft.class_3218.method_18765(class_3218.java:353)

-- Affected level --
Details:
All players: 2 total; [class_3222['Sgt_Falchion'/526, l='ServerWorld minecraft:overworld world3', x=-113.62, y=89.74, z=-1454.59], class_3222['UAGpog'/2920, l='ServerWorld minecraft:overworld world3', x=-364.30, y=63.00, z=-3051.84]]
Chunk stats: ServerChunkCache: 5178
Level dimension: minecraft:overworld
Level spawn location: World: (-479,94,-1355), Chunk: (at 1,5,5 in -30,-85; contains blocks -480,0,-1360 to -465,255,-1345), Region: (-1,-3; contains chunks -32,-96 to -1,-65, blocks -512,0,-1536 to -1,255,-1025)
Level time: 3836498 game time, 3927340 day time
Level name: world3
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Level weather: Rain time: 83181 (now: false), thunder time: 70518 (now: false)
Known server brands: fabric
Level was modded: true
Level storage version: 0x04ABD - Anvil
Stacktrace:
at net.minecraft.server.MinecraftServer.method_3813(MinecraftServer.java:871)
at net.minecraft.class_3176.method_3813(class_3176.java:312)
at net.minecraft.server.MinecraftServer.method_3748(MinecraftServer.java:811)
at net.minecraft.server.MinecraftServer.method_29741(MinecraftServer.java:670)
at net.minecraft.server.MinecraftServer.method_29739(MinecraftServer.java:257)
at java.lang.Thread.run(Thread.java:748)

-- System Details --
Details:
Minecraft Version: 1.16.5
Minecraft Version ID: 1.16.5
Operating System: Linux (amd64) version 4.4.232-1.el7.elrepo.x86_64
Java Version: 1.8.0_292, AdoptOpenJDK
Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), AdoptOpenJDK
Memory: 511031288 bytes (487 MB) / 3363307520 bytes (3207 MB) up to 7456948224 bytes (7111 MB)
CPUs: 4
JVM Flags: 2 total; -Xmx8000M -Xms128M
Fabric Mods:
added_origins_mod: Added Origins V2.0.0
additionalbars: Additional Bars 2.0.4
advanced_runtime_resource_pack: Runtime Resource Pack 0.3.11
amecsapi: Amecs API 1.1.4+mc1.16.5
angerable-patch: Angerable Patch 1.1.0-1.16.4
appletreesrev: Apple Trees Revived 1.3
artifacts: Artifacts 3.2.1+fabric
autoconfig1u: Auto Config v1 Updated 3.3.1
bedspreads: Bedspreads 1.3.1-1.16.4
bettercaves: YUNG's Better Caves 1.16.5-1.2
bettermineshafts: YUNG's Better Mineshafts 1.16.4-1.0.2
betterstrongholds: YUNG's Better Strongholds 1.16.5-1.0
bitsandchisels: BitsAndChisels 2.3.2
bno: Basic Nether Ores 1.16.5-5.5.0-Fabric
bowinfinityfix: Bow Infinity Fix rv9
byg: BYG 1.1.8
caelus: Caelus API 0.0.15-1.16.4
cakechomps: Cake Chomps 1.3.0-1.16.4
candlebackport: Candle Backport 1.0
cardinal-components-base: Cardinal Components API (base) 2.8.2
cardinal-components-block: Cardinal Components API (blocks) 2.7.9
cardinal-components-entity: Cardinal Components API (entities) 2.8.2
cardinal-components-item: Cardinal Components API (items) 2.8.2
classicalart: Classical Art 1.0.0
cleanview: CleanView 1.16.5-v1-fabric
cloth-api: Cloth API 1.4.9
cloth-armor-api-v1: Cloth Armor API v1 1.4.9
cloth-basic-math: Cloth Basic Math 0.5.1
cloth-client-events-v0: Cloth Client Events v0 1.5.47
cloth-common-events-v1: Cloth Common Events v1 1.4.9
cloth-config2: Cloth Config v4 4.11.26
cloth-datagen-api-v1: Cloth Datagen v1 1.4.9
cloth-durability-bar-api-v1: Cloth Durability Bar API v1 1.4.9
cloth-dynamic-registry-api-v1: Cloth Dynamic Registry API v1 1.4.9
cloth-utils-v1: Cloth Utils v1 1.4.9
com_moandjiezana_toml_toml4j: toml4j 0.7.2
comforts: Comforts 0.0.3-1.16.5
compostable-rottenflesh: Compostable Rotten Flesh 1.0.0
controlling: Controlling For Fabric 1.1.2
cookiecore: Oreo Core 0.0.4
cosmetic-armor: Cosmetic Armor 1.0.0
couplings: Couplings 1.3.3
craftable_enchanted_golden_apple: Craftable Enchanted Golden Apple 1.0.0
craftnstar: Craftable nether star 1.1.0
crawl: Crawl 0.8.4
croptopia: Croptopia 1.4.0
curioofundying: Curio of Undying 1.1.1-1.16.5
curios: Curios API 0.0.13-1.16.5
curiouselytra: Curious Elytra 1.1.1-1.16.5
customizableelytra-fabric: Customizableelytra Fabric 1.3.1
editsign: Edit Sign 2.2.0
emotecraft: Emotecraft 2.0.6
enhanced_mushrooms: Enhanced Mushrooms 1.0.2
enhancedcelestials: Enhanced Celestials 1.0.2
enva: Environmental Armor 1.3.1
extraorigins: Extra Origins 1.16.5-12
fabric: Fabric API 0.36.0+1.16
fabric-api-base: Fabric API Base 0.3.0+c88702897d
fabric-api-lookup-api-v1: Fabric API Lookup API (v1) 1.2.0+6aebe11a7d
fabric-biome-api-v1: Fabric Biome API (v1) 3.1.10+3661eaa17d
fabric-command-api-v1: Fabric Command API (v1) 1.1.1+351679a77d
fabric-commands-v0: Fabric Commands (v0) 0.2.2+ca58154a7d
fabric-containers-v0: Fabric Containers (v0) 0.1.11+9354966b7d
fabric-content-registries-v0: Fabric Content Registries (v0) 0.2.1+ca58154a7d
fabric-crash-report-info-v1: Fabric Crash Report Info (v1) 0.1.3+ca58154a7d
fabric-dimensions-v1: Fabric Dimensions API (v1) 2.0.6+61336ba97d
fabric-entity-events-v1: Fabric Entity Events (v1) 1.1.0+c88702897d
fabric-events-interaction-v0: Fabric Events Interaction (v0) 0.4.3+f941baf07d
fabric-events-lifecycle-v0: Fabric Events Lifecycle (v0) 0.2.1+ca58154a7d
fabric-game-rule-api-v1: Fabric Game Rule API (v1) 1.0.6+ca58154a7d
fabric-item-api-v1: Fabric Item API (v1) 1.2.1+ca58154a7d
fabric-item-groups-v0: Fabric Item Groups (v0) 0.2.7+2868a2287d
fabric-language-kotlin: Fabric Language Kotlin 1.6.1+kotlin.1.5.10
fabric-lifecycle-events-v1: Fabric Lifecycle Events (v1) 1.2.1+ca58154a7d
fabric-loot-tables-v1: Fabric Loot Tables (v1) 1.0.2+ca58154a7d
fabric-mining-levels-v0: Fabric Mining Levels (v0) 0.1.3+ca58154a7d
fabric-networking-api-v1: Fabric Networking API (v1) 1.0.3+e3c9d0627d
fabric-networking-blockentity-v0: Fabric Networking Block Entity (v0) 0.2.8+ca58154a7d
fabric-networking-v0: Fabric Networking (v0) 0.3.2+ca58154a7d
fabric-object-builder-api-v1: Fabric Object Builder API (v1) 1.9.5+c88702897d
fabric-object-builders-v0: Fabric Object Builders (v0) 0.7.2+ca58154a7d
fabric-particles-v1: Fabric Particles (v1) 0.2.4+ca58154a7d
fabric-registry-sync-v0: Fabric Registry Sync (v0) 0.7.4+ca58154a7d
fabric-rendering-data-attachment-v1: Fabric Rendering Data Attachment (v1) 0.1.5+ca58154a7d
fabric-resource-loader-v0: Fabric Resource Loader (v0) 0.4.6+2868a2287d
fabric-screen-handler-api-v1: Fabric Screen Handler API (v1) 1.1.5+9354966b7d
fabric-structure-api-v1: Fabric Structure API (v1) 1.1.11+ca0ef93d7d
fabric-tag-extensions-v0: Fabric Tag Extensions (v0) 1.1.1+ca58154a7d
fabric-tool-attribute-api-v1: Fabric Tool Attribute API (v1) 1.2.7+8183d3957d
fabricloader: Fabric Loader 0.11.3
fallflyinglib: FallFlyingLib 1.1.0
fantasycraft: Fantasycraft 1.1.3
fatxporbs: Fat Experience Orbs 0.0.9
fiber: fiber 0.23.0-2
frozenup: Frozen-Up-Fabric 1.16.5-1.0.0
geckolib3: Geckolib 3.0.40
givemehats: Give Me Hats! 1.5.1
gravel-ores: Gravel Ores 1.2.0+1.16.2
imm_ptl_core: Immersive Portals Core 0.99
improved-stations: Improved Stations 2.0.3
jankson: Jankson 3.0.1+j1.2.0
java: OpenJDK 64-Bit Server VM 8
kiln: Kiln 1.1.1+1.16.5
latoorigins: Lato Origins 0.7.3
lavasponge: Lava Sponge 1.0.1
libgui: LibGui 3.3.5+1.16.5
libstructure: Libstructure 1.3
lithium: Lithium 0.6.6
maybe-data: Maybe data 1.0.0-1.16.2
minecraft: Minecraft 1.16.5
mm: Manningham Mills 2.2
moborigins: Mob Origins 1.4.0
more_gems: More Gems 1.1.22
moremessages: MoreMessages 1.3.0
morevillagers-fabric: MoreVillagersFabric 1.4.1-SNAPSHOT
mostructures: Mo' Structures 1.2.0-1.16.5
mousewheelie: Mouse Wheelie 1.7.3+mc1.16.5
musica: Musica 1.3.2
net_openhft_zero-allocation-hashing: zero-allocation-hashing 0.11
netherite_nugget: Netherite Nugget 1.2.1
nha: Netherite Horse Armor 1.1.1
omega-config: OmegaConfig 1.0.4
org_jetbrains_kotlin_kotlin-reflect: kotlin-reflect 1.5.10
org_jetbrains_kotlin_kotlin-stdlib: kotlin-stdlib 1.5.10
org_jetbrains_kotlin_kotlin-stdlib-jdk7: kotlin-stdlib-jdk7 1.5.10
org_jetbrains_kotlin_kotlin-stdlib-jdk8: kotlin-stdlib-jdk8 1.5.10
org_jetbrains_kotlinx_kotlinx-coroutines-core-jvm: kotlinx-coroutines-core-jvm 1.5.0
org_jetbrains_kotlinx_kotlinx-coroutines-jdk8: kotlinx-coroutines-jdk8 1.5.0
org_jetbrains_kotlinx_kotlinx-serialization-core-jvm: kotlinx-serialization-core-jvm 1.2.1
org_jetbrains_kotlinx_kotlinx-serialization-json-jvm: kotlinx-serialization-json-jvm 1.2.1
origins: Origins 0.7.3
origins-classes: Origins: Classes 1.1.0
originsplus: Origins Plus 0.0.2
pehkui: Pehkui 2.2.1+1.14.4-1.17
pigsteel: Pigsteel Mod 1.5.0
playerabilitylib: Pal 1.2.1
polymorph: Polymorph 0.0.10-1.16.5
portalgun: Portal Gun 1.2.5
rayon: Rayon 1.2.3
rayon-core: Rayon Core API 1.2.3
rayon-entity: Rayon Entity API 1.2.3
rayon-particle: Rayon Particle API 1.2.3
reach-entity-attributes: Reach Entity Attributes 1.1.1
repurposed_structures: Repurposed Structures 1.16.5-1.11.6-fabric
rightclickharvest: RightClickHarvest 1.0.0
roughlyenoughitems: Roughly Enough Items 5.12.248
roughlyenoughitems-api: REI (API) 5.12.248
roughlyenoughitems-default-plugin: REI (Default Plugin) 5.12.248
roughlyenoughitems-runtime: REI (Runtime) 5.12.248
simple_backpack: SimpleBackpack 1.0.38
sit: Sit 1.16.5-11
skinnedlanterns: Skinned Lanterns 1.16.5-1.1.3
smoothboot: Smooth Boot 1.16.5-1.6.0
somnus: Somnus API 0.0.11-1.16.5
stacc: Stacc 1.0.1
static-content: Static Content 1.0.1-1.16.2
staticdata: Static Data 1.1.2
step-height-entity-attribute: Step Height Entity Attribute 1.0.0
stoneholm: Stoneholm 1.2.1
things: Things 0.1.3
throwabletorch: ThrowableTorch 1.1
tk_valoeghese_zoesteriaconfig: ZoesteriaConfig 1.3.6
toomanyorigins: TooManyOrigins 0.1.3
transporter: Transporter 1.0.3
trinkets: Trinkets 2.6.7
tweed: Tweed 3.0.0-beta.26
unearthed: Unearthed 1.1.0
unlimiteddragoneggs: Unlimited Dragon Eggs 1.1.1
untitledduckmod: Untitled Duck Mod 0.2.2
villagernames: Villager Names 1.6.0
voicechat: Simple Voice Chat 1.16.5-1.6.4
voyager: Voyager 1.0.0
waystones: Waystones 2.0.1
wiicustomorigins: WiiDude's Custom Origins Mod 1.16.5-13
wolveswitharmor: Wolves With Armor 1.5.4-1.16.5
wthit: wthit 2.10.4
xaerominimap: Xaero's Minimap 21.12.5
xlpackets: XLPackets 1.1
yungsapi: YUNG's API 1.16.5-Fabric-5
zoob: Monster Of The Ocean Depths 3.0.0
Player Count: 2 / 100; [class_3222['Sgt_Falchion'/526, l='ServerWorld minecraft:overworld world3', x=-113.62, y=89.74, z=-1454.59], class_3222['UAGpog'/2920, l='ServerWorld minecraft:overworld world3', x=-364.30, y=63.00, z=-3051.84]]
Data Packs: vanilla, Fabric Mods
Is Modded: Definitely; Server brand changed to 'fabric'
Type: Dedicated Server (map_server.txt)

Lichen no longer does this on Forge
Fabric 1.16.5 is no longer supported