Trying to install Hexxit 1.5.2 on a Server

I'm trying to install the old 1.5.2 Hexxit on a Nitrado Server but the server keeps crashing.
I have like 0 experience with Minecraft Servers, so if anyone knows what the problem is, please help me, here is the crash report:

 

---- Minecraft Crash Report ----
// I bet Cylons wouldn't have this problem.

Time: 2/5/22 11:07 PM
Description: Exception in server tick loop

java.lang.NoClassDefFoundError: net/minecraft/client/multiplayer/WorldClient
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:278)
    at cpw.mods.fml.common.ModClassLoader.loadBaseModClass(ModClassLoader.java:86)
    at cpw.mods.fml.common.modloader.ModLoaderModContainer.constructMod(ModLoaderModContainer.java:483)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
    at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
    at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)
    at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
    at com.google.common.eventbus.EventBus.post(EventBus.java:267)
    at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:192)
    at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:172)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
    at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
    at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)
    at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
    at com.google.common.eventbus.EventBus.post(EventBus.java:267)
    at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:103)
    at cpw.mods.fml.common.Loader.loadMods(Loader.java:504)
    at cpw.mods.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:85)
    at cpw.mods.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:350)
    at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:69)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:431)
    at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:573)
Caused by: java.lang.ClassNotFoundException: net.minecraft.client.multiplayer.WorldClient
    at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:238)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:430)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:363)
    ... 31 more
Caused by: java.lang.RuntimeException: Attempted to load class bds for invalid side SERVER
    at cpw.mods.fml.common.asm.transformers.SideTransformer.transform(SideTransformer.java:50)
    at cpw.mods.fml.relauncher.RelaunchClassLoader.runTransformers(RelaunchClassLoader.java:352)
    at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:225)
    ... 33 more

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

-- System Details --
Details:
    Minecraft Version: 1.5.2
    Operating System: Linux (amd64) version 5.14.18-100.fc33.x86_64
    Java Version: 1.7.0_221, Oracle Corporation
    Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 193635968 bytes (184 MB) / 460849152 bytes (439 MB) up to 2863661056 bytes (2731 MB)
    JVM Flags: 4 total; -Xms256M -Xmx3072M -XX:SoftRefLRUPolicyMSPerMB=1000 -XX:MaxPermSize=96M
    AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
    Suspicious classes: FML and Forge are installed
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    FML: MCP v7.51 FML v5.2.23.737 Minecraft Forge 7.8.1.737 69 mods loaded, 68 mods active
    mcp{7.51} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed
    FML{5.2.23.737} [Forge Mod Loader] (coremods) Unloaded->Constructed
    Forge{7.8.1.737} [Minecraft Forge] (coremods) Unloaded->Constructed
    CoFHFramework{1.5.2.5} [CoFH Framework] (coremods) Unloaded->Constructed
    CodeChickenCore{0.8.7.3} [CodeChicken Core] (coremods) Unloaded->Constructed
    NotEnoughItems{1.5.2.28} [Not Enough Items] (coremods) Unloaded->Constructed
    ImmibisMicroblocks{55.0.7} [Immibis's Microblocks] (coremods) Unloaded->Constructed
    mod_bspkrsCore{v2.09(1.5.2)} [bspkrsCore] ([1.5.2]bspkrsCorev2.09.zip) Unloaded->Constructed
    CoFHCore{1.5.2.5} [CoFHCore] (CoFHCore-1.5.2.5.jar) Unloaded->Constructed
    CoFHWorld{1.5.2.5} [CoFHWorld] (CoFHCore-1.5.2.5.jar) Unloaded->Constructed
    CustomLAN{2.2} [Custom LAN Mod] (CustomPortForge.jar) Unloaded->Constructed
    TreeCapitator{Forge 1.5.2.r14} [TreeCapitator] ([1.5.2]TreeCapitator.Forge.1.5.2.r14.Uni.CoreMod.jar) Unloaded->Constructed
    ImmibisMicroblocksInstallCheck{55.0.7} [Immibis's Microblocks (Checks for incorrect installation, ignore this)] (immibis-microblocks-55.0.7.jar) Unloaded->Constructed
    DamageIndicatorsMod{2.7.0.1} [Damage Indicators] (1.5.2 DamageIndicators v2.7.0.1.zip) Unloaded->Constructed
    AsgardShield_Core{2.0.4} [AsgardShield] (1.5.2AsgardShield_Core_2.0.4Forge.zip) Unloaded->Constructed
    ASAddon_Hallowed{2.0.0} [AS Addon- Hallowed] (1.5.2ASAddonHallowed_v2.0.0Forge.zip) Unloaded->Constructed
    HarkenScythe_Core{2.1.6} [HarkenScythe] (1.5.2HarkenScythe_v2.1.6Forge.zip) Unloaded->Constructed
    ASAddon_HarkenScythe{2.0.0} [AS Addon- HarkenScythe] (1.5.2ASAddonHarkenScythe_v2.0.0Forge.zip) Unloaded->Constructed
    ASAddon_NetherEnder{2.0.0} [AS Addon- Nether-Ender] (1.5.2ASAddonNetherEnder_v2.0.0Forge.zip) Unloaded->Constructed
    ASAddon_ColorAPI{1.0.0} [ASAddon_ColorAPI] (1.5.2AsgardShield_Core_2.0.4Forge.zip) Unloaded->Constructed
    mod_ArmorBarMod{0.7.1} [Armor Bar Mod] (ArmorBarv0.7.1.zip) Unloaded->Constructed
    Artifice{1.5.2R1.1.2} [Artifice] (Artifice-1.1.2-182.jar) Unloaded->Constructed
    ArtificeCompat|Chisel{1.5.2R1.1.2} [Artifice Compat: Chisel] (Artifice-1.1.2-182.jar) Unloaded->Constructed
    ArtificeCompat|EE3{1.5.2R1.1.2} [Artifice Compat: EE3] (Artifice-1.1.2-182.jar) Unloaded->Constructed
    ArtificeCompat|Forestry{1.5.2R1.1.2} [Artifice Compat: Forestry] (Artifice-1.1.2-182.jar) Unloaded->Constructed
    ArtificeCompat|MFR{1.5.2R1.1.2} [Artifice Compat: MFR] (Artifice-1.1.2-182.jar) Unloaded->Constructed
    ArtificeCompat|Railcraft{1.5.2R1.1.2} [Artifice Compat: Railcraft] (Artifice-1.1.2-182.jar) Unloaded->Constructed
    ArtificeCompat|Vanilla{1.5.2R1.1.2} [Artifice Compat: Vanilla] (Artifice-1.1.2-182.jar) Unloaded->Constructed
    mod_BackTools{Not available} [mod_BackTools] (BackTools1.5.2v1.zip) Unloaded
    BattleTowers{1.3.4} [Battle Towers] (BattleTowers_1.5.2.zip) Unloaded
    BetterDungeons{1.8} [Better dungeons] (BetterDungeons.zip) Unloaded
    BiblioCraft{1.3.3} [BiblioCraft] (BiblioCraft[v1.3.3].zip) Unloaded
    mod_BuffBarMod{0.7.1} [Buff Bar Mod] (BuffBarv0.7.1.zip) Unloaded
    DimDoors{1.5.2R1.4.1RC1} [Dimensional Doors] (DimensionalDoors-1.5.2R1.4.1RC1-194.zip) Unloaded
    eplus{1.15.4} [Enchanting Plus] (EnchantingPlus-1.15.4.jar) Unloaded
    ExtrabiomesXL{3.13.4} [ExtrabiomesXL] (ExtrabiomesXL-universal-1.5.2-3.13.4.jar) Unloaded
    hexxitgear{1.5.2R1.0} [Hexxit Gear] (HexxitGear-1.0-23.jar) Unloaded
    InfernalMobs{1.3.1} [Infernal Mobs] (InfernalMobs_1.5.2.zip) Unloaded
    inventorytweaks{1.54b} [Inventory Tweaks] (InventoryTweaks-1.54b.jar) Unloaded
    Meteors{2.10.2} [Falling Meteors] (Meteors Mod V2.10.2.zip) Unloaded
    More Bows{1.5_v1} [More Bows mod] (More bows 1.5.2_2 Forge.jar) Unloaded
    NEIPlugins{1.0.9.3} [NEI Plugins] (NEIPlugins-1.0.9.3.jar) Unloaded
    LegendGear{1.5.2} [LegendGear] (NMcCoy-LegendGear-1.5.2.zip) Unloaded
    Natura{2.1.5} [Natura] (Natura_1.5.2_2.1.5.1.jar) Unloaded
    Natura|CompatMineFactoryReloaded{0.1} [Natura compat: MFR] (Natura_1.5.2_2.1.5.1.jar) Unloaded
    OffLawn{1.0} [offLawn] (OffLawn-1.5.1.zip) Unloaded
    ProjectZulu|Core{1.0.3.8} [Project Zulu Core] (ProjectZuluCompletev1.0.3.8.zip) Unloaded
    ProjectZulu|Blocks{1.0.3.8} [Project Zulu Block and Items] (ProjectZuluCompletev1.0.3.8.zip) Unloaded
    ProjectZulu|Dungeon{1.0.3.8} [Project Zulu Mobs] (ProjectZuluCompletev1.0.3.8.zip) Unloaded
    ProjectZulu|Mobs{1.0.3.8} [Project Zulu Mobs] (ProjectZuluCompletev1.0.3.8.zip) Unloaded
    ProjectZulu|World{1.0.3.8} [Project Zulu World] (ProjectZuluCompletev1.0.3.8.zip) Unloaded
    xreliquary{1.5.2} [Xeno's Reliquary] (Reliquary1.0.6d.zip) Unloaded
    rftl{1.0} [RottenFleshToLeather] (RottenFleshToLeather-1.5.1.zip) Unloaded
    AS_Ruins{10.3} [Ruins Spawning System] (Ruins_1.5.2.zip) Unloaded
    secretroomsmod{4.6.0} [SecretRoomsMod] (SecretRoomsMod-universal-4.6.0.283.zip) Unloaded
    SoulShards{1.0.16} [Soul Shards] (SoulShards-1.0.36-universal-srg.jar) Unloaded
    TConstruct{1.5.2_1.4.3d7} [Tinkers' Construct] (TConstruct_1.5.2_1.4.3.final.jar) Unloaded
    TConstruct|CompatMineFactoryReloaded{0.1} [TConstruct Compat: MFR] (TConstruct_1.5.2_1.4.3.final.jar) Unloaded
    WildCaves3{0.4.2} [Wild Caves 3] (WildCaves3-0.4.2.zip) Unloaded
    BetterStorage{0.6.2.23-hotfix2} [BetterStorage] ([1.5.2]BetterStorage_0.6.2.23-hotfix2.zip) Unloaded
    Backpack{1.12.13} [Backpack] (backpack-1.12.13-1.5.2.zip) Unloaded
    ChestTransporter{1.1.6} [Chest Transporter] (chestTransporter_1.1.6_Universal.zip) Unloaded
    ImmibisCore{55.1.6} [Immibis Core] (immibis-core-55.1.6.jar) Unloaded
    MapWriter{2.0} [MapWriter] (mapwriter-2.0.5.zip) Unloaded
    ObsidiPlates{1.5.0} [Obsidian Pressure Plates] (obsidiplates-1.5.2-universal-1.5.0.13.jar) Unloaded
    QuantumCraft{1.01} [qCraft] (qCraft1.01.zip) Unloaded
    TwilightForest{1.18.1} [The Twilight Forest] (twilightforest-1.18.1.zip) Unloaded
    chococraft{2.8.8} [Torojima's ChocoCraft] (zzzChococraft_2.8.8.zip) Unloaded
    LumySkinPatch{1.0.5} [Lumy Skin Patch] (coremods) Unloaded->Disabled
    Profiler Position: N/A (disabled)
    Is Modded: Definitely; Server brand changed to 'fml,forge'
    Type: Dedicated Server (map_server.txt)