My game crashed once, I reloaded the game and tried going the same direction, it resulted in a crash again.

Crash Report #1:
---- Minecraft Crash Report ----
// My bad.

Time: 5/28/20 9:51 PM
Description: Feature placement

java.lang.UnsupportedOperationException
at com.google.common.collect.ImmutableList.sort(ImmutableList.java:565)
at asi.a(SourceFile:43)
at asi.b(SourceFile:60)
at cot.a(SourceFile:42)
at civ.a(SourceFile:56)
at civ.a(SourceFile:35)
at civ.a(SourceFile:17)
at cja.a(SourceFile:44)
at cow.a(SourceFile:82)
at csr.a(SourceFile:83)
at csr.a(SourceFile:79)
at csy.a(SourceFile:75)
at bqd.a(SourceFile:560)
at bqd$$Lambda$4836/1933166327.accept(Unknown Source)
at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)
at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175)
at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
at it.unimi.dsi.fastutil.longs.LongIterator$$Lambda$4831/1457796620.accept(Unknown Source)
at java.util.PrimitiveIterator$OfLong.forEachRemaining(PrimitiveIterator.java:189)
at it.unimi.dsi.fastutil.longs.LongIterator.forEachRemaining(LongIterator.java:53)
at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:512)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:502)
at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418)
at bqd.a(SourceFile:559)
at cga.a(SourceFile:210)
at cgc.c(SourceFile:84)
at cgc$$Lambda$1684/1837552045.doWork(Unknown Source)
at cgc.a(SourceFile:214)
at yi.a(SourceFile:569)
at yi$$Lambda$3868/982218876.apply(Unknown Source)
at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
at yi.a(SourceFile:563)
at yi$$Lambda$3865/612833852.apply(Unknown Source)
at java.util.concurrent.CompletableFuture.uniCompose(CompletableFuture.java:952)
at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:926)
at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:442)
at yk.b(SourceFile:58)
at yk$$Lambda$3835/1225561913.run(Unknown Source)
at amc.e(SourceFile:94)
at amc.a(SourceFile:137)
at amc.run(SourceFile:105)
at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1402)
at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1689)
at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)

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.collect.ImmutableList.sort(ImmutableList.java:565)
at asi.a(SourceFile:43)
at asi.b(SourceFile:60)
at cot.a(SourceFile:42)
at civ.a(SourceFile:56)
at civ.a(SourceFile:35)
at civ.a(SourceFile:17)
at cja.a(SourceFile:44)
at cow.a(SourceFile:82)
at csr.a(SourceFile:83)
at csr.a(SourceFile:79)
at csy.a(SourceFile:75)
at bqd.a(SourceFile:560)
at bqd$$Lambda$4836/1933166327.accept(Unknown Source)
at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)
at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175)
at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
at it.unimi.dsi.fastutil.longs.LongIterator$$Lambda$4831/1457796620.accept(Unknown Source)
at java.util.PrimitiveIterator$OfLong.forEachRemaining(PrimitiveIterator.java:189)
at it.unimi.dsi.fastutil.longs.LongIterator.forEachRemaining(LongIterator.java:53)
at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:512)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:502)
at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418)

– Feature –
Details:
Id: minecraft:village
Description: clq@3e11996e
Stacktrace:
at bqd.a(SourceFile:559)

– Generation –
Details:
CenterX: -142
CenterZ: -86
Step: SURFACE_STRUCTURES
Seed: -4721639896177965758
Biome: minecraft:snowy_tundra
Stacktrace:
at cga.a(SourceFile:210)
at cgc.c(SourceFile:84)
at cgc$$Lambda$1684/1837552045.doWork(Unknown Source)
at cgc.a(SourceFile:214)

– Chunk to be generated –
Details:
Location: -142,-86
Position hash: -365072220302
Generator: cho@f97cde9
Stacktrace:
at yi.a(SourceFile:569)
at yi$$Lambda$3868/982218876.apply(Unknown Source)
at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
at yi.a(SourceFile:563)
at yi$$Lambda$3865/612833852.apply(Unknown Source)
at java.util.concurrent.CompletableFuture.uniCompose(CompletableFuture.java:952)
at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:926)
at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:442)
at yk.b(SourceFile:58)
at yk$$Lambda$3835/1225561913.run(Unknown Source)
at amc.e(SourceFile:94)
at amc.a(SourceFile:137)
at amc.run(SourceFile:105)

– Affected level –
Details:
All players: 1 total; [yx['Marxalous'/138, l='ServerLevel[The Marx Empire 2.0]', x=-2334.30, y=67.17, z=-1579.47]]
Chunk stats: ServerChunkCache: 4226
Level dimension: minecraft:overworld
Level spawn location: World: (224,72,-176), Chunk: (at 0,4,0 in 14,-11; contains blocks 224,0,-176 to 239,255,-161), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
Level time: 171053 game time, 268096 day time
Level name: The Marx Empire 2.0
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Level weather: Rain time: 112299 (now: false), thunder time: 171066 (now: false)
Known server brands: vanilla
Level was modded: false
Level storage version: 0x04ABD - Anvil
Stacktrace:
at net.minecraft.server.MinecraftServer.b(SourceFile:896)
at net.minecraft.server.MinecraftServer.a(SourceFile:832)
at enr.a(SourceFile:89)
at net.minecraft.server.MinecraftServer.run(SourceFile:691)
at java.lang.Thread.run(Thread.java:745)

– System Details –
Details:
Minecraft Version: 20w21a
Minecraft Version ID: 20w21a
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: 591941000 bytes (564 MB) / 2046820352 bytes (1952 MB) up to 2147483648 bytes (2048 MB)
CPUs: 8
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
Player Count: 1 / 8; [yx['Marxalous'/138, l='ServerLevel[The Marx Empire 2.0]', x=-2334.30, y=67.17, z=-1579.47]]
Data Packs: vanilla
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.

Crash Report #2:
---- Minecraft Crash Report ----
// You're mean.

Time: 5/28/20 9:53 PM
Description: Feature placement

java.lang.UnsupportedOperationException
at com.google.common.collect.ImmutableList.sort(ImmutableList.java:565)
at asi.a(SourceFile:43)
at asi.b(SourceFile:60)
at cot.a(SourceFile:42)
at civ.a(SourceFile:56)
at civ.a(SourceFile:35)
at civ.a(SourceFile:17)
at cja.a(SourceFile:44)
at cow.a(SourceFile:82)
at csr.a(SourceFile:83)
at csr.a(SourceFile:79)
at csy.a(SourceFile:75)
at bqd.a(SourceFile:560)
at bqd$$Lambda$4776/75347471.accept(Unknown Source)
at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)
at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175)
at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
at it.unimi.dsi.fastutil.longs.LongIterator$$Lambda$4771/92167092.accept(Unknown Source)
at java.util.PrimitiveIterator$OfLong.forEachRemaining(PrimitiveIterator.java:189)
at it.unimi.dsi.fastutil.longs.LongIterator.forEachRemaining(LongIterator.java:53)
at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:512)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:502)
at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418)
at bqd.a(SourceFile:559)
at cga.a(SourceFile:210)
at cgc.c(SourceFile:84)
at cgc$$Lambda$1693/52465173.doWork(Unknown Source)
at cgc.a(SourceFile:214)
at yi.a(SourceFile:569)
at yi$$Lambda$3871/1439171563.apply(Unknown Source)
at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
at yi.a(SourceFile:563)
at yi$$Lambda$3868/849637989.apply(Unknown Source)
at java.util.concurrent.CompletableFuture.uniCompose(CompletableFuture.java:952)
at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:926)
at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:442)
at yk.b(SourceFile:58)
at yk$$Lambda$3837/1986483223.run(Unknown Source)
at amc.e(SourceFile:94)
at amc.a(SourceFile:137)
at amc.run(SourceFile:105)
at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1402)
at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1689)
at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)

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.collect.ImmutableList.sort(ImmutableList.java:565)
at asi.a(SourceFile:43)
at asi.b(SourceFile:60)
at cot.a(SourceFile:42)
at civ.a(SourceFile:56)
at civ.a(SourceFile:35)
at civ.a(SourceFile:17)
at cja.a(SourceFile:44)
at cow.a(SourceFile:82)
at csr.a(SourceFile:83)
at csr.a(SourceFile:79)
at csy.a(SourceFile:75)
at bqd.a(SourceFile:560)
at bqd$$Lambda$4776/75347471.accept(Unknown Source)
at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)
at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175)
at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
at it.unimi.dsi.fastutil.longs.LongIterator$$Lambda$4771/92167092.accept(Unknown Source)
at java.util.PrimitiveIterator$OfLong.forEachRemaining(PrimitiveIterator.java:189)
at it.unimi.dsi.fastutil.longs.LongIterator.forEachRemaining(LongIterator.java:53)
at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:512)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:502)
at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418)

– Feature –
Details:
Id: minecraft:village
Description: clq@606c2e4b
Stacktrace:
at bqd.a(SourceFile:559)

– Generation –
Details:
CenterX: -142
CenterZ: -86
Step: SURFACE_STRUCTURES
Seed: -4721639896177965758
Biome: minecraft:snowy_tundra
Stacktrace:
at cga.a(SourceFile:210)
at cgc.c(SourceFile:84)
at cgc$$Lambda$1693/52465173.doWork(Unknown Source)
at cgc.a(SourceFile:214)

– Chunk to be generated –
Details:
Location: -142,-86
Position hash: -365072220302
Generator: cho@7990849f
Stacktrace:
at yi.a(SourceFile:569)
at yi$$Lambda$3871/1439171563.apply(Unknown Source)
at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
at yi.a(SourceFile:563)
at yi$$Lambda$3868/849637989.apply(Unknown Source)
at java.util.concurrent.CompletableFuture.uniCompose(CompletableFuture.java:952)
at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:926)
at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:442)
at yk.b(SourceFile:58)
at yk$$Lambda$3837/1986483223.run(Unknown Source)
at amc.e(SourceFile:94)
at amc.a(SourceFile:137)
at amc.run(SourceFile:105)

– Affected level –
Details:
All players: 1 total; [yx['Marxalous'/140, l='ServerLevel[The Marx Empire 2.0]', x=-2335.91, y=67.25, z=-1580.25]]
Chunk stats: ServerChunkCache: 4226
Level dimension: minecraft:overworld
Level spawn location: World: (224,72,-176), Chunk: (at 0,4,0 in 14,-11; contains blocks 224,0,-176 to 239,255,-161), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
Level time: 170803 game time, 267846 day time
Level name: The Marx Empire 2.0
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Level weather: Rain time: 112549 (now: false), thunder time: 171316 (now: false)
Known server brands: vanilla
Level was modded: false
Level storage version: 0x04ABD - Anvil
Stacktrace:
at net.minecraft.server.MinecraftServer.b(SourceFile:896)
at net.minecraft.server.MinecraftServer.a(SourceFile:832)
at enr.a(SourceFile:89)
at net.minecraft.server.MinecraftServer.run(SourceFile:691)
at java.lang.Thread.run(Thread.java:745)

– System Details –
Details:
Minecraft Version: 20w21a
Minecraft Version ID: 20w21a
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: 967684712 bytes (922 MB) / 1912602624 bytes (1824 MB) up to 2147483648 bytes (2048 MB)
CPUs: 8
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
Player Count: 1 / 8; [yx['Marxalous'/140, l='ServerLevel[The Marx Empire 2.0]', x=-2335.91, y=67.25, z=-1580.25]]
Data Packs: vanilla
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.