My spigot server won't launch

---- Minecraft Crash Report ----
// My bad.

Time: 9/8/19 4:15 PM
Description: Exception in server tick loop

java.lang.NullPointerException: Exception in server tick loop
    at net.minecraft.server.v1_8_R3.NBTTagCompound.a(SourceFile:406)
    at net.minecraft.server.v1_8_R3.NBTTagCompound.load(SourceFile:70)
    at net.minecraft.server.v1_8_R3.NBTTagCompound.a(SourceFile:406)
    at net.minecraft.server.v1_8_R3.NBTTagCompound.load(SourceFile:70)
    at net.minecraft.server.v1_8_R3.NBTTagCompound.a(SourceFile:406)
    at net.minecraft.server.v1_8_R3.NBTTagCompound.load(SourceFile:70)
    at net.minecraft.server.v1_8_R3.NBTCompressedStreamTools.a(NBTCompressedStreamTools.java:84)
    at net.minecraft.server.v1_8_R3.NBTCompressedStreamTools.a(NBTCompressedStreamTools.java:53)
    at net.minecraft.server.v1_8_R3.NBTCompressedStreamTools.a(NBTCompressedStreamTools.java:43)
    at net.minecraft.server.v1_8_R3.ChunkRegionLoader.loadChunk(ChunkRegionLoader.java:71)
    at org.bukkit.craftbukkit.v1_8_R3.chunkio.ChunkIOProvider.callStage1(ChunkIOProvider.java:25)
    at org.bukkit.craftbukkit.v1_8_R3.chunkio.ChunkIOProvider.callStage1(ChunkIOProvider.java:1)
    at org.bukkit.craftbukkit.v1_8_R3.util.AsynchronousExecutor.skipQueue(AsynchronousExecutor.java:336)
    at org.bukkit.craftbukkit.v1_8_R3.util.AsynchronousExecutor.getSkipQueue(AsynchronousExecutor.java:295)
    at org.bukkit.craftbukkit.v1_8_R3.chunkio.ChunkIOExecutor.syncChunkLoad(ChunkIOExecutor.java:16)
    at net.minecraft.server.v1_8_R3.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:135)
    at net.minecraft.server.v1_8_R3.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:117)
    at net.minecraft.server.v1_8_R3.MinecraftServer.k(MinecraftServer.java:363)
    at net.minecraft.server.v1_8_R3.MinecraftServer.a(MinecraftServer.java:327)
    at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:267)
    at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:563)
    at java.lang.Thread.run(Thread.java:748)

A detailed walkthrough of the error, its code path and all known details is as follows:
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-- System Details --
Details:
    Minecraft Version: 1.8.8
    Operating System: Linux (amd64) version 4.15.0-52-generic
    Java Version: 1.8.0_212, Oracle Corporation
    Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 442776688 bytes (422 MB) / 514850816 bytes (491 MB) up to 7635730432 bytes (7282 MB)
    JVM Flags: 2 total; -Xms512M -Xmx8192M
    IntCache: cache: 0, tcache: 0, allocated: 29, tallocated: 77
    CraftBukkit Information: 
   Running: CraftBukkit version git-PaperSpigot-"4c7641d" (MC: 1.8.8) (Implementing API version 1.8.8-R0.1-SNAPSHOT) true
   Plugins: {}
   Warnings: DEFAULT
   Reload Count: 0
   Threads: { WAITING Reference Handler: [java.lang.Object.wait(Native Method), java.lang.Object.wait(Object.java:502), java.lang.ref.Reference.tryHandlePending(Reference.java:191), java.lang.ref.Reference$ReferenceHandler.run(Reference.java:153)], TIMED_WAITING Server Infinisleeper: [java.lang.Thread.sleep(Native Method), net.minecraft.server.v1_8_R3.DedicatedServer$1.run(DedicatedServer.java:54)], TIMED_WAITING process reaper: [sun.misc.Unsafe.park(Native Method), java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215), java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460), java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362), java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941), java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073), java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134), java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624), java.lang.Thread.run(Thread.java:748)], RUNNABLE Server console handler: [java.io.FileInputStream.readBytes(Native Method), java.io.FileInputStream.read(FileInputStream.java:255), java.io.BufferedInputStream.fill(BufferedInputStream.java:246), java.io.BufferedInputStream.read(BufferedInputStream.java:265), org.bukkit.craftbukkit.libs.jline.internal.NonBlockingInputStream.read(NonBlockingInputStream.java:169), org.bukkit.craftbukkit.libs.jline.internal.NonBlockingInputStream.read(NonBlockingInputStream.java:137), org.bukkit.craftbukkit.libs.jline.internal.NonBlockingInputStream.read(NonBlockingInputStream.java:246), org.bukkit.craftbukkit.libs.jline.internal.InputStreamReader.read(InputStreamReader.java:261), org.bukkit.craftbukkit.libs.jline.internal.InputStreamReader.read(InputStreamReader.java:198), org.bukkit.craftbukkit.libs.jline.console.ConsoleReader.readCharacter(ConsoleReader.java:2145), org.bukkit.craftbukkit.libs.jline.console.ConsoleReader.readLine(ConsoleReader.java:2349), net.minecraft.server.v1_8_R3.DedicatedServer$2.run(DedicatedServer.java:79)], RUNNABLE Server thread: [java.lang.Thread.dumpThreads(Native Method), java.lang.Thread.getAllStackTraces(Thread.java:1610), org.bukkit.craftbukkit.v1_8_R3.CraftCrashReport.call(CraftCrashReport.java:29), net.minecraft.server.v1_8_R3.CrashReportSystemDetails.a(SourceFile:78), net.minecraft.server.v1_8_R3.CrashReport.h(CrashReport.java:127), net.minecraft.server.v1_8_R3.CrashReport.<init>(CrashReport.java:34), net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:636), java.lang.Thread.run(Thread.java:748)], WAITING Finalizer: [java.lang.Object.wait(Native Method), java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:144), java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:165), java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:216)], RUNNABLE Signal Dispatcher: [], RUNNABLE Thread-5: [java.lang.UNIXProcess.forkAndExec(Native Method), java.lang.UNIXProcess.<init>(UNIXProcess.java:247), java.lang.ProcessImpl.start(ProcessImpl.java:134), java.lang.ProcessBuilder.start(ProcessBuilder.java:1029), java.lang.Runtime.exec(Runtime.java:620), java.lang.Runtime.exec(Runtime.java:485), org.bukkit.craftbukkit.libs.jline.internal.TerminalLineSettings.exec(TerminalLineSettings.java:196), org.bukkit.craftbukkit.libs.jline.internal.TerminalLineSettings.exec(TerminalLineSettings.java:186), org.bukkit.craftbukkit.libs.jline.internal.TerminalLineSettings.stty(TerminalLineSettings.java:181), org.bukkit.craftbukkit.libs.jline.internal.TerminalLineSettings.get(TerminalLineSettings.java:74), org.bukkit.craftbukkit.libs.jline.internal.TerminalLineSettings.getProperty(TerminalLineSettings.java:95), org.bukkit.craftbukkit.libs.jline.UnixTerminal.getWidth(UnixTerminal.java:76), org.bukkit.craftbukkit.libs.jline.console.ConsoleReader.drawBuffer(ConsoleReader.java:879), org.bukkit.craftbukkit.libs.jline.console.ConsoleReader.drawBuffer(ConsoleReader.java:898), org.bukkit.craftbukkit.libs.jline.console.ConsoleReader.drawLine(ConsoleReader.java:608), org.bukkit.craftbukkit.v1_8_R3.util.TerminalConsoleWriterThread.run(TerminalConsoleWriterThread.java:38), java.lang.Thread.run(Thread.java:748)], TIMED_WAITING process reaper: [sun.misc.Unsafe.park(Native Method), java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215), java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460), java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362), java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941), java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073), java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134), java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624), java.lang.Thread.run(Thread.java:748)], TIMED_WAITING PaperSpigot Watchdog Thread: [java.lang.Thread.sleep(Native Method), org.spigotmc.WatchdogThread.run(WatchdogThread.java:92)], WAITING NonBlockingInputStreamThread: [java.lang.Object.wait(Native Method), org.bukkit.craftbukkit.libs.jline.internal.NonBlockingInputStream.run(NonBlockingInputStream.java:278), java.lang.Thread.run(Thread.java:748)], RUNNABLE DestroyJavaVM: [], RUNNABLE Netty Epoll Server IO #0: [io.netty.channel.epoll.Native.epollWait(Native Method), io.netty.channel.epoll.EpollEventLoop.epollWait(EpollEventLoop.java:194), io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:219), io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116), java.lang.Thread.run(Thread.java:748)], WAITING Snooper Timer: [java.lang.Object.wait(Native Method), java.lang.Object.wait(Object.java:502), java.util.TimerThread.mainLoop(Timer.java:526), java.util.TimerThread.run(Timer.java:505)], TIMED_WAITING Spigot Metrics Thread: [java.lang.Object.wait(Native Method), java.util.TimerThread.mainLoop(Timer.java:552), java.util.TimerThread.run(Timer.java:505)],}
   Recent tasks from -31--1{}
    Profiler Position: N/A (disabled)
    Player Count: 0 / 20; []
    Is Modded: Definitely; Server brand changed to 'PaperSpigot'
    Type: Dedicated Server (map_server.txt)