random crash help!

my server after an open time gets crash for ticking entity or some like that

here is crash.txt

---- Minecraft Crash Report ----
// Surprise! Haha. Well, this is awkward.

Time: 15/01/20 0:37
Description: Ticking entity

java.lang.NullPointerException: Ticking entity
at net.minecraft.server.v1_15_R1.Entity.teleportTo(Entity.java:2454)
at net.minecraft.server.v1_15_R1.Entity.a(Entity.java:2424)
at net.minecraft.server.v1_15_R1.Entity.doPortalTick(Entity.java:2053)
at net.minecraft.server.v1_15_R1.Entity.postTick(Entity.java:365)
at net.minecraft.server.v1_15_R1.WorldServer.entityJoinedWorld(WorldServer.java:624)
at net.minecraft.server.v1_15_R1.World.a(World.java:718)
at net.minecraft.server.v1_15_R1.WorldServer.doTick(WorldServer.java:395)
at net.minecraft.server.v1_15_R1.MinecraftServer.b(MinecraftServer.java:1076)
at net.minecraft.server.v1_15_R1.DedicatedServer.b(DedicatedServer.java:393)
at net.minecraft.server.v1_15_R1.MinecraftServer.a(MinecraftServer.java:978)
at net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:823)
at java.lang.Thread.run(Unknown Source)


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

-- Head --
Thread: Server thread
Stacktrace:
at net.minecraft.server.v1_15_R1.Entity.teleportTo(Entity.java:2454)
at net.minecraft.server.v1_15_R1.Entity.a(Entity.java:2424)
at net.minecraft.server.v1_15_R1.Entity.doPortalTick(Entity.java:2053)
at net.minecraft.server.v1_15_R1.Entity.postTick(Entity.java:365)
at net.minecraft.server.v1_15_R1.WorldServer.entityJoinedWorld(WorldServer.java:624)

-- Entity being ticked --
Details:
Entity Type: minecraft:zombie_pigman (net.minecraft.server.v1_15_R1.EntityPigZombie)
Entity ID: 37545
Entity Name: Zombie Pigman
Entity's Exact location: 1387.54, 63.17, -376.13
Entity's Block location: World: (1387,63,-377), Chunk: (at 11,3,7 in 86,-24; contains blocks 1376,0,-384 to 1391,255,-369), Region: (2,-1; contains chunks 64,-32 to 95,-1, blocks 1024,0,-512 to 1535,255,-1)
Entity's Momentum: 0.03, 0.08, 0.01
Entity's Passengers: []
Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
at net.minecraft.server.v1_15_R1.World.a(World.java:718)
at net.minecraft.server.v1_15_R1.WorldServer.doTick(WorldServer.java:395)

-- Affected level --
Details:
All players: 1 total; [EntityPlayer['ArcanFree'/24223, l='world_nether', x=1392.70, y=121.00, z=-365.35](ArcanFree at 1392.699999988079,121.0,-365.34705034699664)]
Chunk stats: ServerChunkCache: 4050
Level dimension: minecraft:the_nether
Level name: world_nether
Level seed: 6562849011291619761
Level generator: ID 00 - default, ver 1. Features enabled: true
Level generator options: {}
Level spawn location: World: (0,64,0), Chunk: (at 0,4,0 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 630163 game time, 630163 day time
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
at net.minecraft.server.v1_15_R1.MinecraftServer.b(MinecraftServer.java:1076)
at net.minecraft.server.v1_15_R1.DedicatedServer.b(DedicatedServer.java:393)
at net.minecraft.server.v1_15_R1.MinecraftServer.a(MinecraftServer.java:978)
at net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:823)
at java.lang.Thread.run(Unknown Source)

It's the first time I publish in case I'm missing something or I'm wrong : (

 

Plugins (24): ActionAnnouncer, Chairs, ColoredAnvils*, ColorSigns*, DeadChest, Essentials, EssentialsChat, FireworkOnJoin*, Harbor, JupiterCore, NoCommand*, ParticleHats, PermissionsBukkit*, PlayerParticles, ProtocolLib, SexyMotd*, SimplePrefix-RL2*, SkinsRestorer, TabList, UltimateTimber, Vault, WhitelistPlus*, XPBoost